Update flake8 config

Author: domdfcoding

tox.ini

@@ -68,6 +68,36 @@ commands =
     twine check dist/*.tar.gz dist/*.whl
     check-wheel-contents dist/
 
+[testenv:lint]
+basepython = python3.7
+changedir = {toxinidir}
+ignore_errors = True
+skip_install = False
+deps =
+    flake8>=3.8.2,<5
+    flake8-2020>=1.6.0
+    flake8-builtins>=1.5.3
+    flake8-docstrings>=1.5.0
+    flake8-dunder-all>=0.1.1
+    flake8-encodings>=0.1.0
+    flake8-github-actions>=0.1.0
+    flake8-noqa>=1.1.0,<=1.2.2
+    flake8-pyi>=20.10.0,<=22.8.0
+    flake8-pytest-style>=1.3.0
+    flake8-quotes>=3.3.0
+    flake8-slots>=0.1.0
+    flake8-sphinx-links>=0.0.4
+    flake8-strftime>=0.1.1
+    flake8-typing-imports>=1.10.0
+    git+https://github.com/domdfcoding/flake8-rst-docstrings-sphinx.git
+    git+https://github.com/domdfcoding/flake8-rst-docstrings.git
+    git+https://github.com/python-formate/flake8-unused-arguments.git@magic-methods
+    git+https://github.com/python-formate/flake8-missing-annotations.git
+    pydocstyle>=6.0.0
+    pygments>=2.7.1
+    importlib_metadata<4.5.0; python_version<'3.8'
+commands = python3 -m flake8_rst_docstrings_sphinx flake8_sphinx_links tests --allow-toolbox {posargs}
+
 [testenv:perflint]
 basepython = python3.6
 changedir = {toxinidir}
@@ -162,28 +192,5 @@ filterwarnings =
     error
     ignore:can't resolve package from __spec__ or __package__, falling back on __name__ and __path__:ImportWarning
 
-[testenv:lint]
-basepython = python3.6
-changedir = {toxinidir}
-ignore_errors = True
-deps =
-    flake8 >=3.8.2
-    flake8-2020 >= 1.6.0
-    flake8-builtins>=1.5.3
-    flake8-docstrings>=1.5.0
-    flake8-dunder-all>=0.1.1
-    flake8-github-actions>=0.1.0
-    flake8-pyi>=20.10.0
-    flake8-pytest-style>=1.3.0
-    flake8-sphinx-links>=0.0.4
-    flake8-strftime>=0.1.1
-    flake8-typing-imports>=1.10.0
-    git+https://github.com/PyCQA/pydocstyle@5118faa7173b0e5bbc230c4adf628758e13605bf
-    git+https://github.com/domdfcoding/flake8-quotes.git
-    git+https://github.com/domdfcoding/flake8-rst-docstrings.git
-    git+https://github.com/domdfcoding/flake8-rst-docstrings-sphinx.git
-    pygments>=2.7.1
-commands = python3 -m flake8_rst_docstrings_sphinx flake8_sphinx_links tests --allow-toolbox {posargs}
-
 [dep_checker]
 allowed_unused = flake8