Bump linters (#2886)

.github/workflows/tox.yml

@@ -54,6 +54,9 @@ jobs:
       # Even our lint and other envs need access to tox
       - name: Install a default Python
         uses: actions/setup-python@v2
+        # workaround to avoid getting 3.9 in:
+        with:
+          python-version: '3.8'
         if: ${{ ! contains(matrix.tox_env, 'py') }}
       # Be sure to install the version of python needed by a specific test, if necessary
       - name: Set up Python version

.pre-commit-config.yaml

@@ -4,8 +4,8 @@ exclude: |
         ^docs/conf.py$
     )
 repos:
-  - repo: https://github.com/pre-commit/mirrors-isort
-    rev: v5.4.2
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.6.4
     hooks:
       - id: isort
   - repo: https://github.com/python/black.git
@@ -25,7 +25,7 @@ repos:
       - id: debug-statements
         language_version: python3
   - repo: https://gitlab.com/pycqa/flake8.git
-    rev: 3.8.3
+    rev: 3.8.4
     hooks:
       - id: flake8
         additional_dependencies:
@@ -35,14 +35,14 @@ repos:
           - flake8-docstrings>=1.5.0
         language_version: python3
   - repo: https://github.com/adrienverge/yamllint.git
-    rev: v1.24.2
+    rev: v1.25.0
     hooks:
       - id: yamllint
         files: \.(yaml|yml)$
         types: [file, yaml]
         entry: yamllint --strict
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.782
+    rev: v0.790
     hooks:
       - id: mypy
         # empty args needed in order to match mypy cli behavior

tox.ini

@@ -79,6 +79,8 @@ whitelist_externals =
 
 [testenv:lint]
 description = Runs all linting tasks
+# temporary due to https://github.com/PyCQA/pylint/issues/3876
+basepython = python3.8
 commands =
     # to run a single linter you can do "pre-commit run flake8"
     python -m pre_commit run {posargs:--all}