[pre-commit.ci] pre-commit autoupdate (#230)
[pre-commit.ci] pre-commit autoupdate (#230)

updates:
- [github.com/PyCQA/flake8: 3.9.0 → 3.9.1](https://github.com/PyCQA/flake8/compare/3.9.0...3.9.1)

Co-authored-by: pre-commit-ci[bot] <3ea08453efb076ca910552532a53973a6527df40@users.noreply.github.com>
adamchainz/pytest-restrict