Update flake8-builtins to 2.5.0

[pyup-bot]

This PR updates flake8-builtins from 2.2.0 to 2.5.0.

Changelog

2.5.0

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- Support detecting a shadowing folder as module name (as part of `A005`).
[asfaltboy]

2.4.0

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- Add rule for lambda argument shadowing (`A006`).
[cielavenir]

2.3.0

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- Add rule for builtin module name shadowing (`A005`).
[asfaltboy]

Links

• PyPI: https://pypi.org/project/flake8-builtins
• Changelog: https://data.safetycli.com/changelogs/flake8-builtins/

[pyup-bot]

Closing this in favor of #645