Flake8-builtins

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- Honor `--builtins` option from flake8 73.
[gforcada]

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- Add official support for python 3.10 and 3.11. [gforcada] [michael-k]

- Update options handling. [gforcada]

- Simplify testing. [gforcada]

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- Mark support for python 3.9. [lovetoburnswhen]

- Replace travis for GitHub. [cclauss]

- Fix CI badge. [sobolevn]

- Make black and isort mandatory. [cclauss]

- Drop python 2.7 and 3.6. [gforcada]

- Overhaul GitHub actions to test on actual supported python versions. [gforcada]

- New flake8 option `--builtins-ignorelist` to specify a list of builtins to ignore. [gsingh93]

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- Change messages to have shorter text

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- Add `DictComp`, `SetComp`, and `GeneratorExpr` support.
[sobolevn]

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- Adds kwonly and posonly args support.
[sobolevn]