[pre-commit.ci] pre-commit autoupdate
[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.5b1 → 21.5b2](https://github.com/psf/black/compare/21.5b1...21.5b2)
- [github.com/asottile/pyupgrade: v2.16.0 → v2.19.0](https://github.com/asottile/pyupgrade/compare/v2.16.0...v2.19.0)

nicoddemus/pytest-xdist,pytest-dev/pytest-xdist