Restore setuptools-scm requirement
[pre-commit.ci] pre-commit autoupdate updates: - https://gitlab.com/pycqa/flake8 → https://github.com/PyCQA/flake8 - [github.com/PyCQA/flake8: 3.9.2 → 5.0.4](https://github.com/PyCQA/flake8/compare/3.9.2...5.0.4)