Bump flake8 from 4.0.1 to 5.0.1

Created by: dependabot[bot]

Bumps flake8 from 4.0.1 to 5.0.1.

Commits

• 405cfe0 Release 5.0.1
• d20bb97 Merge pull request #1631 from PyCQA/dupe-sys-path
• fce93b9 prevent duplicate plugin discovery on misconfigured pythons
• 3f4872a Merge pull request #1628 from mxr/patch-1
• b0cad55 Remove needless sort in _style_guide_for
• c7c6218 Release 5.0.0
• a826649 Merge pull request #1626 from PyCQA/pycodestyle-2-9
• 7838f11 upgrade pycodestyle to 2.9.x
• 66b3211 Merge pull request #1625 from PyCQA/upgrade-pyflakes
• b9e0c6e upgrade pyflakes to 2.5.x
• Additional commits viewable in compare view

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