Bump flake8 from 4.0.1 to 5.0.3

Created by: dependabot[bot]

Bumps flake8 from 4.0.1 to 5.0.3.

Commits

• ff6569b Release 5.0.3
• e76b59a Merge pull request #1648 from PyCQA/invalid-syntax-partial-parse
• 25e8ff1 ignore config files that partially parse as flake8 configs
• 70c0b3d Release 5.0.2
• 5e69ba9 Merge pull request #1642 from PyCQA/no-home
• 8b51ee4 skip skipping home if home does not exist
• 446b18d Merge pull request #1641 from PyCQA/entry-points-not-pickleable
• b70d7a2 work around un-pickleabiliy of EntryPoint in 3.8.0
• 91a7fa9 fix order of release notes
• 405cfe0 Release 5.0.1
• Additional commits viewable in compare view

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