update packages

4 files changed, 386 insertions, 631 deletions

diff --git a/node_modules/lodash.merge/LICENSE b/node_modules/lodash.merge/LICENSE
index e0c69d560..c6f2f6145 100644
--- a/node_modules/lodash.merge/LICENSE
+++ b/node_modules/lodash.merge/LICENSE
@@ -1,4 +1,4 @@
-Copyright jQuery Foundation and other contributors <https://jquery.org/>
+Copyright JS Foundation and other contributors <https://js.foundation/>
 
 Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
diff --git a/node_modules/lodash.merge/README.md b/node_modules/lodash.merge/README.md
index d8a0ea4c7..2e0ca9b3e 100644
--- a/node_modules/lodash.merge/README.md
+++ b/node_modules/lodash.merge/README.md
@@ -1,6 +1,6 @@
-# lodash.merge v4.6.0
+# lodash.merge v4.6.1
 
-The [lodash](https://lodash.com/) method `_.merge` exported as a [Node.js](https://nodejs.org/) module.
+The [Lodash](https://lodash.com/) method `_.merge` exported as a [Node.js](https://nodejs.org/) module.
 
 ## Installation
 
@@ -15,4 +15,4 @@ In Node.js:
 var merge = require('lodash.merge');
 ```
 
-See the [documentation](https://lodash.com/docs#merge) or [package source](https://github.com/lodash/lodash/blob/4.6.0-npm-packages/lodash.merge) for more details.
+See the [documentation](https://lodash.com/docs#merge) or [package source](https://github.com/lodash/lodash/blob/4.6.1-npm-packages/lodash.merge) for more details.
diff --git a/node_modules/lodash.merge/index.js b/node_modules/lodash.merge/index.js
index e7e710576..4f7b5d3a8 100644
--- a/node_modules/lodash.merge/index.js
+++ b/node_modules/lodash.merge/index.js
@@ -1,7 +1,7 @@
 /**
- * lodash (Custom Build) <https://lodash.com/>
+ * Lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Copyright JS Foundation and other contributors <https://js.foundation/>
  * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
@@ -13,12 +13,17 @@ var LARGE_ARRAY_SIZE = 200;
 /** Used to stand-in for `undefined` hash values. */
 var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
+/** Used to detect hot functions by number of calls within a span of milliseconds. */
+var HOT_COUNT = 800,
+    HOT_SPAN = 16;
+
 /** Used as references for various `Number` constants. */
 var MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
     arrayTag = '[object Array]',
+    asyncTag = '[object AsyncFunction]',
     boolTag = '[object Boolean]',
     dateTag = '[object Date]',
     errorTag = '[object Error]',
@@ -26,12 +31,13 @@ var argsTag = '[object Arguments]',
     genTag = '[object GeneratorFunction]',
     mapTag = '[object Map]',
     numberTag = '[object Number]',
+    nullTag = '[object Null]',
     objectTag = '[object Object]',
-    promiseTag = '[object Promise]',
+    proxyTag = '[object Proxy]',
     regexpTag = '[object RegExp]',
     setTag = '[object Set]',
     stringTag = '[object String]',
-    symbolTag = '[object Symbol]',
+    undefinedTag = '[object Undefined]',
     weakMapTag = '[object WeakMap]';
 
 var arrayBufferTag = '[object ArrayBuffer]',
@@ -52,9 +58,6 @@ var arrayBufferTag = '[object ArrayBuffer]',
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
-/** Used to match `RegExp` flags from their coerced string values. */
-var reFlags = /\w*$/;
-
 /** Used to detect host constructors (Safari). */
 var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
@@ -77,22 +80,6 @@ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
 typedArrayTags[setTag] = typedArrayTags[stringTag] =
 typedArrayTags[weakMapTag] = false;
 
-/** Used to identify `toStringTag` values supported by `_.clone`. */
-var cloneableTags = {};
-cloneableTags[argsTag] = cloneableTags[arrayTag] =
-cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
-cloneableTags[boolTag] = cloneableTags[dateTag] =
-cloneableTags[float32Tag] = cloneableTags[float64Tag] =
-cloneableTags[int8Tag] = cloneableTags[int16Tag] =
-cloneableTags[int32Tag] = cloneableTags[mapTag] =
-cloneableTags[numberTag] = cloneableTags[objectTag] =
-cloneableTags[regexpTag] = cloneableTags[setTag] =
-cloneableTags[stringTag] = cloneableTags[symbolTag] =
-cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
-cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
-cloneableTags[errorTag] = cloneableTags[funcTag] =
-cloneableTags[weakMapTag] = false;
-
 /** Detect free variable `global` from Node.js. */
 var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
 
@@ -117,7 +104,7 @@ var freeProcess = moduleExports && freeGlobal.process;
 /** Used to access faster Node.js helpers. */
 var nodeUtil = (function() {
   try {
-    return freeProcess && freeProcess.binding('util');
+    return freeProcess && freeProcess.binding && freeProcess.binding('util');
   } catch (e) {}
 }());
 
@@ -125,34 +112,6 @@ var nodeUtil = (function() {
 var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
- * Adds the key-value `pair` to `map`.
- *
- * @private
- * @param {Object} map The map to modify.
- * @param {Array} pair The key-value pair to add.
- * @returns {Object} Returns `map`.
- */
-function addMapEntry(map, pair) {
-  // Don't return `map.set` because it's not chainable in IE 11.
-  map.set(pair[0], pair[1]);
-  return map;
-}
-
-/**
- * Adds `value` to `set`.
- *
- * @private
- * @param {Object} set The set to modify.
- * @param {*} value The value to add.
- * @returns {Object} Returns `set`.
- */
-function addSetEntry(set, value) {
-  // Don't return `set.add` because it's not chainable in IE 11.
-  set.add(value);
-  return set;
-}
-
-/**
  * A faster alternative to `Function#apply`, this function invokes `func`
  * with the `this` binding of `thisArg` and the arguments of `args`.
  *
@@ -173,71 +132,6 @@ function apply(func, thisArg, args) {
 }
 
 /**
- * A specialized version of `_.forEach` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
- */
-function arrayEach(array, iteratee) {
-  var index = -1,
-      length = array ? array.length : 0;
-
-  while (++index < length) {
-    if (iteratee(array[index], index, array) === false) {
-      break;
-    }
-  }
-  return array;
-}
-
-/**
- * Appends the elements of `values` to `array`.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to append.
- * @returns {Array} Returns `array`.
- */
-function arrayPush(array, values) {
-  var index = -1,
-      length = values.length,
-      offset = array.length;
-
-  while (++index < length) {
-    array[offset + index] = values[index];
-  }
-  return array;
-}
-
-/**
- * A specialized version of `_.reduce` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the first element of `array` as
- *  the initial value.
- * @returns {*} Returns the accumulated value.
- */
-function arrayReduce(array, iteratee, accumulator, initAccum) {
-  var index = -1,
-      length = array ? array.length : 0;
-
-  if (initAccum && length) {
-    accumulator = array[++index];
-  }
-  while (++index < length) {
-    accumulator = iteratee(accumulator, array[index], index, array);
-  }
-  return accumulator;
-}
-
-/**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
  *
@@ -282,42 +176,6 @@ function getValue(object, key) {
 }
 
 /**
- * Checks if `value` is a host object in IE < 9.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
- */
-function isHostObject(value) {
-  // Many host objects are `Object` objects that can coerce to strings
-  // despite having improperly defined `toString` methods.
-  var result = false;
-  if (value != null && typeof value.toString != 'function') {
-    try {
-      result = !!(value + '');
-    } catch (e) {}
-  }
-  return result;
-}
-
-/**
- * Converts `map` to its key-value pairs.
- *
- * @private
- * @param {Object} map The map to convert.
- * @returns {Array} Returns the key-value pairs.
- */
-function mapToArray(map) {
-  var index = -1,
-      result = Array(map.size);
-
-  map.forEach(function(value, key) {
-    result[++index] = [key, value];
-  });
-  return result;
-}
-
-/**
  * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
@@ -332,20 +190,17 @@ function overArg(func, transform) {
 }
 
 /**
- * Converts `set` to an array of its values.
+ * Gets the value at `key`, unless `key` is "__proto__".
  *
  * @private
- * @param {Object} set The set to convert.
- * @returns {Array} Returns the values.
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
  */
-function setToArray(set) {
-  var index = -1,
-      result = Array(set.size);
-
-  set.forEach(function(value) {
-    result[++index] = value;
-  });
-  return result;
+function safeGet(object, key) {
+  return key == '__proto__'
+    ? undefined
+    : object[key];
 }
 
 /** Used for built-in method references. */
@@ -356,27 +211,27 @@ var arrayProto = Array.prototype,
 /** Used to detect overreaching core-js shims. */
 var coreJsData = root['__core-js_shared__'];
 
-/** Used to detect methods masquerading as native. */
-var maskSrcKey = (function() {
-  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
-  return uid ? ('Symbol(src)_1.' + uid) : '';
-}());
-
 /** Used to resolve the decompiled source of functions. */
 var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
-/** Used to infer the `Object` constructor. */
-var objectCtorString = funcToString.call(Object);
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
 
 /**
  * Used to resolve the
  * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
-var objectToString = objectProto.toString;
+var nativeObjectToString = objectProto.toString;
+
+/** Used to infer the `Object` constructor. */
+var objectCtorString = funcToString.call(Object);
 
 /** Used to detect if a method is native. */
 var reIsNative = RegExp('^' +
@@ -388,35 +243,53 @@ var reIsNative = RegExp('^' +
 var Buffer = moduleExports ? root.Buffer : undefined,
     Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
+    allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
     getPrototype = overArg(Object.getPrototypeOf, Object),
     objectCreate = Object.create,
     propertyIsEnumerable = objectProto.propertyIsEnumerable,
-    splice = arrayProto.splice;
+    splice = arrayProto.splice,
+    symToStringTag = Symbol ? Symbol.toStringTag : undefined;
+
+var defineProperty = (function() {
+  try {
+    var func = getNative(Object, 'defineProperty');
+    func({}, '', {});
+    return func;
+  } catch (e) {}
+}());
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetSymbols = Object.getOwnPropertySymbols,
-    nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
-    nativeKeys = overArg(Object.keys, Object),
-    nativeMax = Math.max;
+var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+    nativeMax = Math.max,
+    nativeNow = Date.now;
 
 /* Built-in method references that are verified to be native. */
-var DataView = getNative(root, 'DataView'),
-    Map = getNative(root, 'Map'),
-    Promise = getNative(root, 'Promise'),
-    Set = getNative(root, 'Set'),
-    WeakMap = getNative(root, 'WeakMap'),
+var Map = getNative(root, 'Map'),
     nativeCreate = getNative(Object, 'create');
 
-/** Used to detect maps, sets, and weakmaps. */
-var dataViewCtorString = toSource(DataView),
-    mapCtorString = toSource(Map),
-    promiseCtorString = toSource(Promise),
-    setCtorString = toSource(Set),
-    weakMapCtorString = toSource(WeakMap);
-
-/** Used to convert symbols to primitives and strings. */
-var symbolProto = Symbol ? Symbol.prototype : undefined,
-    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
+/**
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
+ *
+ * @private
+ * @param {Object} proto The object to inherit from.
+ * @returns {Object} Returns the new object.
+ */
+var baseCreate = (function() {
+  function object() {}
+  return function(proto) {
+    if (!isObject(proto)) {
+      return {};
+    }
+    if (objectCreate) {
+      return objectCreate(proto);
+    }
+    object.prototype = proto;
+    var result = new object;
+    object.prototype = undefined;
+    return result;
+  };
+}());
 
 /**
  * Creates a hash object.
@@ -427,7 +300,7 @@ var symbolProto = Symbol ? Symbol.prototype : undefined,
  */
 function Hash(entries) {
   var index = -1,
-      length = entries ? entries.length : 0;
+      length = entries == null ? 0 : entries.length;
 
   this.clear();
   while (++index < length) {
@@ -445,6 +318,7 @@ function Hash(entries) {
  */
 function hashClear() {
   this.__data__ = nativeCreate ? nativeCreate(null) : {};
+  this.size = 0;
 }
 
 /**
@@ -458,7 +332,9 @@ function hashClear() {
  * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  */
 function hashDelete(key) {
-  return this.has(key) && delete this.__data__[key];
+  var result = this.has(key) && delete this.__data__[key];
+  this.size -= result ? 1 : 0;
+  return result;
 }
 
 /**
@@ -490,7 +366,7 @@ function hashGet(key) {
  */
 function hashHas(key) {
   var data = this.__data__;
-  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+  return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
 }
 
 /**
@@ -505,6 +381,7 @@ function hashHas(key) {
  */
 function hashSet(key, value) {
   var data = this.__data__;
+  this.size += this.has(key) ? 0 : 1;
   data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
   return this;
 }
@@ -525,7 +402,7 @@ Hash.prototype.set = hashSet;
  */
 function ListCache(entries) {
   var index = -1,
-      length = entries ? entries.length : 0;
+      length = entries == null ? 0 : entries.length;
 
   this.clear();
   while (++index < length) {
@@ -543,6 +420,7 @@ function ListCache(entries) {
  */
 function listCacheClear() {
   this.__data__ = [];
+  this.size = 0;
 }
 
 /**
@@ -567,6 +445,7 @@ function listCacheDelete(key) {
   } else {
     splice.call(data, index, 1);
   }
+  --this.size;
   return true;
 }
 
@@ -614,6 +493,7 @@ function listCacheSet(key, value) {
       index = assocIndexOf(data, key);
 
   if (index < 0) {
+    ++this.size;
     data.push([key, value]);
   } else {
     data[index][1] = value;
@@ -637,7 +517,7 @@ ListCache.prototype.set = listCacheSet;
  */
 function MapCache(entries) {
   var index = -1,
-      length = entries ? entries.length : 0;
+      length = entries == null ? 0 : entries.length;
 
   this.clear();
   while (++index < length) {
@@ -654,6 +534,7 @@ function MapCache(entries) {
  * @memberOf MapCache
  */
 function mapCacheClear() {
+  this.size = 0;
   this.__data__ = {
     'hash': new Hash,
     'map': new (Map || ListCache),
@@ -671,7 +552,9 @@ function mapCacheClear() {
  * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  */
 function mapCacheDelete(key) {
-  return getMapData(this, key)['delete'](key);
+  var result = getMapData(this, key)['delete'](key);
+  this.size -= result ? 1 : 0;
+  return result;
 }
 
 /**
@@ -711,7 +594,11 @@ function mapCacheHas(key) {
  * @returns {Object} Returns the map cache instance.
  */
 function mapCacheSet(key, value) {
-  getMapData(this, key).set(key, value);
+  var data = getMapData(this, key),
+      size = data.size;
+
+  data.set(key, value);
+  this.size += data.size == size ? 0 : 1;
   return this;
 }
 
@@ -730,7 +617,8 @@ MapCache.prototype.set = mapCacheSet;
  * @param {Array} [entries] The key-value pairs to cache.
  */
 function Stack(entries) {
-  this.__data__ = new ListCache(entries);
+  var data = this.__data__ = new ListCache(entries);
+  this.size = data.size;
 }
 
 /**
@@ -742,6 +630,7 @@ function Stack(entries) {
  */
 function stackClear() {
   this.__data__ = new ListCache;
+  this.size = 0;
 }
 
 /**
@@ -754,7 +643,11 @@ function stackClear() {
  * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  */
 function stackDelete(key) {
-  return this.__data__['delete'](key);
+  var data = this.__data__,
+      result = data['delete'](key);
+
+  this.size = data.size;
+  return result;
 }
 
 /**
@@ -794,16 +687,18 @@ function stackHas(key) {
  * @returns {Object} Returns the stack cache instance.
  */
 function stackSet(key, value) {
-  var cache = this.__data__;
-  if (cache instanceof ListCache) {
-    var pairs = cache.__data__;
+  var data = this.__data__;
+  if (data instanceof ListCache) {
+    var pairs = data.__data__;
     if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
       pairs.push([key, value]);
+      this.size = ++data.size;
       return this;
     }
-    cache = this.__data__ = new MapCache(pairs);
+    data = this.__data__ = new MapCache(pairs);
   }
-  cache.set(key, value);
+  data.set(key, value);
+  this.size = data.size;
   return this;
 }
 
@@ -823,18 +718,26 @@ Stack.prototype.set = stackSet;
  * @returns {Array} Returns the array of property names.
  */
 function arrayLikeKeys(value, inherited) {
-  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-  // Safari 9 makes `arguments.length` enumerable in strict mode.
-  var result = (isArray(value) || isArguments(value))
-    ? baseTimes(value.length, String)
-    : [];
-
-  var length = result.length,
-      skipIndexes = !!length;
+  var isArr = isArray(value),
+      isArg = !isArr && isArguments(value),
+      isBuff = !isArr && !isArg && isBuffer(value),
+      isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+      skipIndexes = isArr || isArg || isBuff || isType,
+      result = skipIndexes ? baseTimes(value.length, String) : [],
+      length = result.length;
 
   for (var key in value) {
     if ((inherited || hasOwnProperty.call(value, key)) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+        !(skipIndexes && (
+           // Safari 9 has enumerable `arguments.length` in strict mode.
+           key == 'length' ||
+           // Node.js 0.10 has enumerable non-index properties on buffers.
+           (isBuff && (key == 'offset' || key == 'parent')) ||
+           // PhantomJS 2 has enumerable non-index properties on typed arrays.
+           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
+           // Skip index properties.
+           isIndex(key, length)
+        ))) {
       result.push(key);
     }
   }
@@ -852,8 +755,8 @@ function arrayLikeKeys(value, inherited) {
  */
 function assignMergeValue(object, key, value) {
   if ((value !== undefined && !eq(object[key], value)) ||
-      (typeof key == 'number' && value === undefined && !(key in object))) {
-    object[key] = value;
+      (value === undefined && !(key in object))) {
+    baseAssignValue(object, key, value);
   }
 }
 
@@ -871,7 +774,7 @@ function assignValue(object, key, value) {
   var objValue = object[key];
   if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
       (value === undefined && !(key in object))) {
-    object[key] = value;
+    baseAssignValue(object, key, value);
   }
 }
 
@@ -894,130 +797,65 @@ function assocIndexOf(array, key) {
 }
 
 /**
- * The base implementation of `_.assign` without support for multiple sources
- * or `customizer` functions.
+ * The base implementation of `assignValue` and `assignMergeValue` without
+ * value checks.
  *
  * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @returns {Object} Returns `object`.
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
  */
-function baseAssign(object, source) {
-  return object && copyObject(source, keys(source), object);
-}
-
-/**
- * The base implementation of `_.clone` and `_.cloneDeep` which tracks
- * traversed objects.
- *
- * @private
- * @param {*} value The value to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @param {boolean} [isFull] Specify a clone including symbols.
- * @param {Function} [customizer] The function to customize cloning.
- * @param {string} [key] The key of `value`.
- * @param {Object} [object] The parent object of `value`.
- * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
- * @returns {*} Returns the cloned value.
- */
-function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
-  var result;
-  if (customizer) {
-    result = object ? customizer(value, key, object, stack) : customizer(value);
-  }
-  if (result !== undefined) {
-    return result;
-  }
-  if (!isObject(value)) {
-    return value;
-  }
-  var isArr = isArray(value);
-  if (isArr) {
-    result = initCloneArray(value);
-    if (!isDeep) {
-      return copyArray(value, result);
-    }
+function baseAssignValue(object, key, value) {
+  if (key == '__proto__' && defineProperty) {
+    defineProperty(object, key, {
+      'configurable': true,
+      'enumerable': true,
+      'value': value,
+      'writable': true
+    });
   } else {
-    var tag = getTag(value),
-        isFunc = tag == funcTag || tag == genTag;
-
-    if (isBuffer(value)) {
-      return cloneBuffer(value, isDeep);
-    }
-    if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
-      if (isHostObject(value)) {
-        return object ? value : {};
-      }
-      result = initCloneObject(isFunc ? {} : value);
-      if (!isDeep) {
-        return copySymbols(value, baseAssign(result, value));
-      }
-    } else {
-      if (!cloneableTags[tag]) {
-        return object ? value : {};
-      }
-      result = initCloneByTag(value, tag, baseClone, isDeep);
-    }
-  }
-  // Check for circular references and return its corresponding clone.
-  stack || (stack = new Stack);
-  var stacked = stack.get(value);
-  if (stacked) {
-    return stacked;
-  }
-  stack.set(value, result);
-
-  if (!isArr) {
-    var props = isFull ? getAllKeys(value) : keys(value);
+    object[key] = value;
   }
-  arrayEach(props || value, function(subValue, key) {
-    if (props) {
-      key = subValue;
-      subValue = value[key];
-    }
-    // Recursively populate clone (susceptible to call stack limits).
-    assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
-  });
-  return result;
 }
 
 /**
- * The base implementation of `_.create` without support for assigning
- * properties to the created object.
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
  *
  * @private
- * @param {Object} prototype The object to inherit from.
- * @returns {Object} Returns the new object.
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
  */
-function baseCreate(proto) {
-  return isObject(proto) ? objectCreate(proto) : {};
-}
+var baseFor = createBaseFor();
 
 /**
- * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
- * `keysFunc` and `symbolsFunc` to get the enumerable property names and
- * symbols of `object`.
+ * The base implementation of `getTag` without fallbacks for buggy environments.
  *
  * @private
- * @param {Object} object The object to query.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @param {Function} symbolsFunc The function to get the symbols of `object`.
- * @returns {Array} Returns the array of property names and symbols.
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
  */
-function baseGetAllKeys(object, keysFunc, symbolsFunc) {
-  var result = keysFunc(object);
-  return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+function baseGetTag(value) {
+  if (value == null) {
+    return value === undefined ? undefinedTag : nullTag;
+  }
+  return (symToStringTag && symToStringTag in Object(value))
+    ? getRawTag(value)
+    : objectToString(value);
 }
 
 /**
- * The base implementation of `getTag`.
+ * The base implementation of `_.isArguments`.
  *
  * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  */
-function baseGetTag(value) {
-  return objectToString.call(value);
+function baseIsArguments(value) {
+  return isObjectLike(value) && baseGetTag(value) == argsTag;
 }
 
 /**
@@ -1032,7 +870,7 @@ function baseIsNative(value) {
   if (!isObject(value) || isMasked(value)) {
     return false;
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
   return pattern.test(toSource(value));
 }
 
@@ -1045,27 +883,7 @@ function baseIsNative(value) {
  */
 function baseIsTypedArray(value) {
   return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
-}
-
-/**
- * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
-function baseKeys(object) {
-  if (!isPrototype(object)) {
-    return nativeKeys(object);
-  }
-  var result = [];
-  for (var key in Object(object)) {
-    if (hasOwnProperty.call(object, key) && key != 'constructor') {
-      result.push(key);
-    }
-  }
-  return result;
+    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
 }
 
 /**
@@ -1105,21 +923,14 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
   if (object === source) {
     return;
   }
-  if (!(isArray(source) || isTypedArray(source))) {
-    var props = baseKeysIn(source);
-  }
-  arrayEach(props || source, function(srcValue, key) {
-    if (props) {
-      key = srcValue;
-      srcValue = source[key];
-    }
+  baseFor(source, function(srcValue, key) {
     if (isObject(srcValue)) {
       stack || (stack = new Stack);
       baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
     }
     else {
       var newValue = customizer
-        ? customizer(object[key], srcValue, (key + ''), object, source, stack)
+        ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
         : undefined;
 
       if (newValue === undefined) {
@@ -1127,7 +938,7 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
       }
       assignMergeValue(object, key, newValue);
     }
-  });
+  }, keysIn);
 }
 
 /**
@@ -1146,8 +957,8 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
  *  counterparts.
  */
 function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
-  var objValue = object[key],
-      srcValue = source[key],
+  var objValue = safeGet(object, key),
+      srcValue = safeGet(source, key),
       stacked = stack.get(srcValue);
 
   if (stacked) {
@@ -1161,29 +972,37 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
   var isCommon = newValue === undefined;
 
   if (isCommon) {
+    var isArr = isArray(srcValue),
+        isBuff = !isArr && isBuffer(srcValue),
+        isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+
     newValue = srcValue;
-    if (isArray(srcValue) || isTypedArray(srcValue)) {
+    if (isArr || isBuff || isTyped) {
       if (isArray(objValue)) {
         newValue = objValue;
       }
       else if (isArrayLikeObject(objValue)) {
         newValue = copyArray(objValue);
       }
-      else {
+      else if (isBuff) {
+        isCommon = false;
+        newValue = cloneBuffer(srcValue, true);
+      }
+      else if (isTyped) {
         isCommon = false;
-        newValue = baseClone(srcValue, true);
+        newValue = cloneTypedArray(srcValue, true);
+      }
+      else {
+        newValue = [];
       }
     }
     else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+      newValue = objValue;
       if (isArguments(objValue)) {
         newValue = toPlainObject(objValue);
       }
       else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
-        isCommon = false;
-        newValue = baseClone(srcValue, true);
-      }
-      else {
-        newValue = objValue;
+        newValue = initCloneObject(srcValue);
       }
     }
     else {
@@ -1208,27 +1027,27 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
  * @returns {Function} Returns the new function.
  */
 function baseRest(func, start) {
-  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
-  return function() {
-    var args = arguments,
-        index = -1,
-        length = nativeMax(args.length - start, 0),
-        array = Array(length);
-
-    while (++index < length) {
-      array[index] = args[start + index];
-    }
-    index = -1;
-    var otherArgs = Array(start + 1);
-    while (++index < start) {
-      otherArgs[index] = args[index];
-    }
-    otherArgs[start] = array;
-    return apply(func, this, otherArgs);
-  };
+  return setToString(overRest(func, start, identity), func + '');
 }
 
 /**
+ * The base implementation of `setToString` without support for hot loop shorting.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+var baseSetToString = !defineProperty ? identity : function(func, string) {
+  return defineProperty(func, 'toString', {
+    'configurable': true,
+    'enumerable': false,
+    'value': constant(string),
+    'writable': true
+  });
+};
+
+/**
  * Creates a clone of  `buffer`.
  *
  * @private
@@ -1240,7 +1059,9 @@ function cloneBuffer(buffer, isDeep) {
   if (isDeep) {
     return buffer.slice();
   }
-  var result = new buffer.constructor(buffer.length);
+  var length = buffer.length,
+      result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+
   buffer.copy(result);
   return result;
 }
@@ -1259,71 +1080,6 @@ function cloneArrayBuffer(arrayBuffer) {
 }
 
 /**
- * Creates a clone of `dataView`.
- *
- * @private
- * @param {Object} dataView The data view to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned data view.
- */
-function cloneDataView(dataView, isDeep) {
-  var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
-  return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
-}
-
-/**
- * Creates a clone of `map`.
- *
- * @private
- * @param {Object} map The map to clone.
- * @param {Function} cloneFunc The function to clone values.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned map.
- */
-function cloneMap(map, isDeep, cloneFunc) {
-  var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
-  return arrayReduce(array, addMapEntry, new map.constructor);
-}
-
-/**
- * Creates a clone of `regexp`.
- *
- * @private
- * @param {Object} regexp The regexp to clone.
- * @returns {Object} Returns the cloned regexp.
- */
-function cloneRegExp(regexp) {
-  var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
-  result.lastIndex = regexp.lastIndex;
-  return result;
-}
-
-/**
- * Creates a clone of `set`.
- *
- * @private
- * @param {Object} set The set to clone.
- * @param {Function} cloneFunc The function to clone values.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned set.
- */
-function cloneSet(set, isDeep, cloneFunc) {
-  var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
-  return arrayReduce(array, addSetEntry, new set.constructor);
-}
-
-/**
- * Creates a clone of the `symbol` object.
- *
- * @private
- * @param {Object} symbol The symbol object to clone.
- * @returns {Object} Returns the cloned symbol object.
- */
-function cloneSymbol(symbol) {
-  return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
-}
-
-/**
  * Creates a clone of `typedArray`.
  *
  * @private
@@ -1366,6 +1122,7 @@ function copyArray(source, array) {
  * @returns {Object} Returns `object`.
  */
 function copyObject(source, props, object, customizer) {
+  var isNew = !object;
   object || (object = {});
 
   var index = -1,
@@ -1378,24 +1135,19 @@ function copyObject(source, props, object, customizer) {
       ? customizer(object[key], source[key], key, object, source)
       : undefined;
 
-    assignValue(object, key, newValue === undefined ? source[key] : newValue);
+    if (newValue === undefined) {
+      newValue = source[key];
+    }
+    if (isNew) {
+      baseAssignValue(object, key, newValue);
+    } else {
+      assignValue(object, key, newValue);
+    }
   }
   return object;
 }
 
 /**
- * Copies own symbol properties of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy symbols from.
- * @param {Object} [object={}] The object to copy symbols to.
- * @returns {Object} Returns `object`.
- */
-function copySymbols(source, object) {
-  return copyObject(source, getSymbols(source), object);
-}
-
-/**
  * Creates a function like `_.assign`.
  *
  * @private
@@ -1429,14 +1181,27 @@ function createAssigner(assigner) {
 }
 
 /**
- * Creates an array of own enumerable property names and symbols of `object`.
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
  *
  * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names and symbols.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
  */
-function getAllKeys(object) {
-  return baseGetAllKeys(object, keys, getSymbols);
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
 }
 
 /**
@@ -1468,63 +1233,28 @@ function getNative(object, key) {
 }
 
 /**
- * Creates an array of the own enumerable symbol properties of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of symbols.
- */
-var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
-
-/**
- * Gets the `toStringTag` of `value`.
+ * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
  *
  * @private
  * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
+ * @returns {string} Returns the raw `toStringTag`.
  */
-var getTag = baseGetTag;
-
-// Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge < 14, and promises in Node.js.
-if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
-    (Map && getTag(new Map) != mapTag) ||
-    (Promise && getTag(Promise.resolve()) != promiseTag) ||
-    (Set && getTag(new Set) != setTag) ||
-    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
-  getTag = function(value) {
-    var result = objectToString.call(value),
-        Ctor = result == objectTag ? value.constructor : undefined,
-        ctorString = Ctor ? toSource(Ctor) : undefined;
-
-    if (ctorString) {
-      switch (ctorString) {
-        case dataViewCtorString: return dataViewTag;
-        case mapCtorString: return mapTag;
-        case promiseCtorString: return promiseTag;
-        case setCtorString: return setTag;
-        case weakMapCtorString: return weakMapTag;
-      }
-    }
-    return result;
-  };
-}
+function getRawTag(value) {
+  var isOwn = hasOwnProperty.call(value, symToStringTag),
+      tag = value[symToStringTag];
 
-/**
- * Initializes an array clone.
- *
- * @private
- * @param {Array} array The array to clone.
- * @returns {Array} Returns the initialized clone.
- */
-function initCloneArray(array) {
-  var length = array.length,
-      result = array.constructor(length);
+  try {
+    value[symToStringTag] = undefined;
+    var unmasked = true;
+  } catch (e) {}
 
-  // Add properties assigned by `RegExp#exec`.
-  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
-    result.index = array.index;
-    result.input = array.input;
+  var result = nativeObjectToString.call(value);
+  if (unmasked) {
+    if (isOwn) {
+      value[symToStringTag] = tag;
+    } else {
+      delete value[symToStringTag];
+    }
   }
   return result;
 }
@@ -1543,55 +1273,6 @@ function initCloneObject(object) {
 }
 
 /**
- * Initializes an object clone based on its `toStringTag`.
- *
- * **Note:** This function only supports cloning values with tags of
- * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
- *
- * @private
- * @param {Object} object The object to clone.
- * @param {string} tag The `toStringTag` of the object to clone.
- * @param {Function} cloneFunc The function to clone values.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the initialized clone.
- */
-function initCloneByTag(object, tag, cloneFunc, isDeep) {
-  var Ctor = object.constructor;
-  switch (tag) {
-    case arrayBufferTag:
-      return cloneArrayBuffer(object);
-
-    case boolTag:
-    case dateTag:
-      return new Ctor(+object);
-
-    case dataViewTag:
-      return cloneDataView(object, isDeep);
-
-    case float32Tag: case float64Tag:
-    case int8Tag: case int16Tag: case int32Tag:
-    case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
-      return cloneTypedArray(object, isDeep);
-
-    case mapTag:
-      return cloneMap(object, isDeep, cloneFunc);
-
-    case numberTag:
-    case stringTag:
-      return new Ctor(object);
-
-    case regexpTag:
-      return cloneRegExp(object);
-
-    case setTag:
-      return cloneSet(object, isDeep, cloneFunc);
-
-    case symbolTag:
-      return cloneSymbol(object);
-  }
-}
-
-/**
  * Checks if `value` is a valid array-like index.
  *
  * @private
@@ -1600,10 +1281,13 @@ function initCloneByTag(object, tag, cloneFunc, isDeep) {
  * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
  */
 function isIndex(value, length) {
+  var type = typeof value;
   length = length == null ? MAX_SAFE_INTEGER : length;
+
   return !!length &&
-    (typeof value == 'number' || reIsUint.test(value)) &&
-    (value > -1 && value % 1 == 0 && value < length);
+    (type == 'number' ||
+      (type != 'symbol' && reIsUint.test(value))) &&
+        (value > -1 && value % 1 == 0 && value < length);
 }
 
 /**
@@ -1689,10 +1373,90 @@ function nativeKeysIn(object) {
 }
 
 /**
+ * Converts `value` to a string using `Object.prototype.toString`.
+ *
+ * @private
+ * @param {*} value The value to convert.
+ * @returns {string} Returns the converted string.
+ */
+function objectToString(value) {
+  return nativeObjectToString.call(value);
+}
+
+/**
+ * A specialized version of `baseRest` which transforms the rest array.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @param {Function} transform The rest array transform.
+ * @returns {Function} Returns the new function.
+ */
+function overRest(func, start, transform) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = transform(array);
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * Sets the `toString` method of `func` to return `string`.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+var setToString = shortOut(baseSetToString);
+
+/**
+ * Creates a function that'll short out and invoke `identity` instead
+ * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+ * milliseconds.
+ *
+ * @private
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new shortable function.
+ */
+function shortOut(func) {
+  var count = 0,
+      lastCalled = 0;
+
+  return function() {
+    var stamp = nativeNow(),
+        remaining = HOT_SPAN - (stamp - lastCalled);
+
+    lastCalled = stamp;
+    if (remaining > 0) {
+      if (++count >= HOT_COUNT) {
+        return arguments[0];
+      }
+    } else {
+      count = 0;
+    }
+    return func.apply(undefined, arguments);
+  };
+}
+
+/**
  * Converts `func` to its source code.
  *
  * @private
- * @param {Function} func The function to process.
+ * @param {Function} func The function to convert.
  * @returns {string} Returns the source code.
  */
 function toSource(func) {
@@ -1761,11 +1525,10 @@ function eq(value, other) {
  * _.isArguments([1, 2, 3]);
  * // => false
  */
-function isArguments(value) {
-  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
-    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
-}
+var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
+  return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
+    !propertyIsEnumerable.call(value, 'callee');
+};
 
 /**
  * Checks if `value` is classified as an `Array` object.
@@ -1887,10 +1650,13 @@ var isBuffer = nativeIsBuffer || stubFalse;
  * // => false
  */
 function isFunction(value) {
+  if (!isObject(value)) {
+    return false;
+  }
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8-9 which returns 'object' for typed array and other constructors.
-  var tag = isObject(value) ? objectToString.call(value) : '';
-  return tag == funcTag || tag == genTag;
+  // in Safari 9 which returns 'object' for typed arrays and other constructors.
+  var tag = baseGetTag(value);
+  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
 }
 
 /**
@@ -1951,7 +1717,7 @@ function isLength(value) {
  */
 function isObject(value) {
   var type = typeof value;
-  return !!value && (type == 'object' || type == 'function');
+  return value != null && (type == 'object' || type == 'function');
 }
 
 /**
@@ -1979,7 +1745,7 @@ function isObject(value) {
  * // => false
  */
 function isObjectLike(value) {
-  return !!value && typeof value == 'object';
+  return value != null && typeof value == 'object';
 }
 
 /**
@@ -2011,8 +1777,7 @@ function isObjectLike(value) {
  * // => true
  */
 function isPlainObject(value) {
-  if (!isObjectLike(value) ||
-      objectToString.call(value) != objectTag || isHostObject(value)) {
+  if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
     return false;
   }
   var proto = getPrototype(value);
@@ -2020,8 +1785,8 @@ function isPlainObject(value) {
     return true;
   }
   var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
-  return (typeof Ctor == 'function' &&
-    Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString);
+  return typeof Ctor == 'function' && Ctor instanceof Ctor &&
+    funcToString.call(Ctor) == objectCtorString;
 }
 
 /**
@@ -2072,38 +1837,6 @@ function toPlainObject(value) {
 }
 
 /**
- * Creates an array of the own enumerable property names of `object`.
- *
- * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
- * for more details.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.keys(new Foo);
- * // => ['a', 'b'] (iteration order is not guaranteed)
- *
- * _.keys('hi');
- * // => ['0', '1']
- */
-function keys(object) {
-  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
-}
-
-/**
  * Creates an array of the own and inherited enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects.
@@ -2166,25 +1899,48 @@ var merge = createAssigner(function(object, source, srcIndex) {
 });
 
 /**
- * This method returns a new empty array.
+ * Creates a function that returns `value`.
  *
  * @static
  * @memberOf _
- * @since 4.13.0
+ * @since 2.4.0
  * @category Util
- * @returns {Array} Returns the new empty array.
+ * @param {*} value The value to return from the new function.
+ * @returns {Function} Returns the new constant function.
  * @example
  *
- * var arrays = _.times(2, _.stubArray);
+ * var objects = _.times(2, _.constant({ 'a': 1 }));
  *
- * console.log(arrays);
- * // => [[], []]
+ * console.log(objects);
+ * // => [{ 'a': 1 }, { 'a': 1 }]
  *
- * console.log(arrays[0] === arrays[1]);
- * // => false
+ * console.log(objects[0] === objects[1]);
+ * // => true
+ */
+function constant(value) {
+  return function() {
+    return value;
+  };
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
  */
-function stubArray() {
-  return [];
+function identity(value) {
+  return value;
 }
 
 /**
diff --git a/node_modules/lodash.merge/package.json b/node_modules/lodash.merge/package.json
index 68aa76cf1..3b37b63a2 100644
--- a/node_modules/lodash.merge/package.json
+++ b/node_modules/lodash.merge/package.json
@@ -1,7 +1,7 @@
 {
   "name": "lodash.merge",
-  "version": "4.6.0",
-  "description": "The lodash method `_.merge` exported as a module.",
+  "version": "4.6.1",
+  "description": "The Lodash method `_.merge` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
   "license": "MIT",
@@ -9,7 +9,6 @@
   "author": "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
   "contributors": [
     "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
-    "Blaine Bublitz <blaine.bublitz@gmail.com> (https://github.com/phated)",
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",