[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/reorder_python_imports: v3.0.1 → v3.1.0](https://github.com/asottile/reorder_python_imports/compare/v3.0.1...v3.1.0)
- [github.com/pre-commit/mirrors-mypy: v0.942 → v0.950](https://github.com/pre-commit/mirrors-mypy/compare/v0.942...v0.950)