Merge #19348: test: Bump linter versions

39d526bde48d98af4fa27906e85db0399b6aa8b1 test: Bump linter versions (Duncan Dean)

Pull request description:

  As per #19346, `mypy==0.700` was incompatible with Python 3.8.

  I've bumped the versions of all the linters to their latest stable versions.

  Checked with both Python 3.7 and 3.8 and everything still seems to work fine.

ACKs for top commit:
  hebasto:
    ACK 39d526bde48d98af4fa27906e85db0399b6aa8b1, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: f3ee7fda8095aa25aa68685e863076d52a6b82649770d24b0064d652763c0ceb8ebcbf9024fc74fca45c754e67b2a831dd070b3af23bc099140e6d27e89a5319

4 files changed, 9 insertions, 11 deletions

diff --git a/ci/lint/04_install.sh b/ci/lint/04_install.sh
index 26b576c1ae..80d0df4a78 100755
--- a/ci/lint/04_install.sh
+++ b/ci/lint/04_install.sh
@@ -6,11 +6,11 @@
 
 export LC_ALL=C
 
-travis_retry pip3 install codespell==1.15.0
-travis_retry pip3 install flake8==3.7.8
+travis_retry pip3 install codespell==1.17.1
+travis_retry pip3 install flake8==3.8.3
 travis_retry pip3 install yq
-travis_retry pip3 install mypy==0.700
+travis_retry pip3 install mypy==0.781
 
-SHELLCHECK_VERSION=v0.6.0
-curl -s "https://storage.googleapis.com/shellcheck/shellcheck-${SHELLCHECK_VERSION}.linux.x86_64.tar.xz" | tar --xz -xf - --directory /tmp/
+SHELLCHECK_VERSION=v0.7.1
+curl -sL "https://github.com/koalaman/shellcheck/releases/download/${SHELLCHECK_VERSION}/shellcheck-${SHELLCHECK_VERSION}.linux.x86_64.tar.xz" | tar --xz -xf - --directory /tmp/
 export PATH="/tmp/shellcheck-${SHELLCHECK_VERSION}:${PATH}"
diff --git a/test/README.md b/test/README.md
index b036a66f67..2341eef00d 100644
--- a/test/README.md
+++ b/test/README.md
@@ -260,11 +260,11 @@ Use the `-v` option for verbose output.
 
 | Lint test | Dependency | Version [used by CI](../ci/lint/04_install.sh) | Installation
 |-----------|:----------:|:-------------------------------------------:|--------------
-| [`lint-python.sh`](lint/lint-python.sh) | [flake8](https://gitlab.com/pycqa/flake8) | [3.7.8](https://github.com/bitcoin/bitcoin/pull/15257) | `pip3 install flake8==3.7.8`
-| [`lint-python.sh`](lint/lint-python.sh) | [mypy](https://github.com/python/mypy) | [0.700](https://github.com/bitcoin/bitcoin/pull/18210) | `pip3 install mypy==0.700`
-| [`lint-shell.sh`](lint/lint-shell.sh) | [ShellCheck](https://github.com/koalaman/shellcheck) | [0.6.0](https://github.com/bitcoin/bitcoin/pull/15166) | [details...](https://github.com/koalaman/shellcheck#installing)
+| [`lint-python.sh`](lint/lint-python.sh) | [flake8](https://gitlab.com/pycqa/flake8) | [3.8.3](https://github.com/bitcoin/bitcoin/pull/19348) | `pip3 install flake8==3.8.3`
+| [`lint-python.sh`](lint/lint-python.sh) | [mypy](https://github.com/python/mypy) | [0.781](https://github.com/bitcoin/bitcoin/pull/19348) | `pip3 install mypy==0.781`
+| [`lint-shell.sh`](lint/lint-shell.sh) | [ShellCheck](https://github.com/koalaman/shellcheck) | [0.7.1](https://github.com/bitcoin/bitcoin/pull/19348) | [details...](https://github.com/koalaman/shellcheck#installing)
 | [`lint-shell.sh`](lint/lint-shell.sh) | [yq](https://github.com/kislyuk/yq) | default | `pip3 install yq`
-| [`lint-spelling.sh`](lint/lint-spelling.sh) | [codespell](https://github.com/codespell-project/codespell) | [1.15.0](https://github.com/bitcoin/bitcoin/pull/16186) | `pip3 install codespell==1.15.0`
+| [`lint-spelling.sh`](lint/lint-spelling.sh) | [codespell](https://github.com/codespell-project/codespell) | [1.17.1](https://github.com/bitcoin/bitcoin/pull/19348) | `pip3 install codespell==1.17.1`
 
 Please be aware that on Linux distributions all dependencies are usually available as packages, but could be outdated.
 
diff --git a/test/lint/lint-python.sh b/test/lint/lint-python.sh
index decea38c4f..72e8ef7c7d 100755
--- a/test/lint/lint-python.sh
+++ b/test/lint/lint-python.sh
@@ -39,7 +39,6 @@ enabled=(
     E711 # comparison to None should be 'if cond is None:'
     E714 # test for object identity should be "is not"
     E721 # do not compare types, use "isinstance()"
-    E741 # do not use variables named "l", "O", or "I"
     E742 # do not define classes named "l", "O", or "I"
     E743 # do not define functions named "l", "O", or "I"
     E901 # SyntaxError: invalid syntax
diff --git a/test/lint/lint-shell.sh b/test/lint/lint-shell.sh
index 563e076b35..9a26cd9c02 100755
--- a/test/lint/lint-shell.sh
+++ b/test/lint/lint-shell.sh
@@ -25,7 +25,6 @@ disabled=(
 disabled_gitian=(
     SC2094 # Make sure not to read and write the same file in the same pipeline.
     SC2129 # Consider using { cmd1; cmd2; } >> file instead of individual redirects.
-    SC2230 # which is non-standard. Use builtin 'command -v' instead.
 )
 
 EXIT_CODE=0