[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci[bot]]

updates:

• github.com/psf/black: 21.5b2 → 21.6b0
• github.com/asottile/pyupgrade: v2.19.1 → v2.19.4
• github.com/pre-commit/mirrors-mypy: v0.812 → v0.902
• github.com/pre-commit/mirrors-mypy: v0.812 → v0.902

[joshmoore]

test_suite.py:10: error: Library stubs not installed for "yaml" (or incompatible with Python 3.8)
test_suite.py:10: note: Hint: "python3 -m pip install types-PyYAML"

is something I've seen on the Zarr repos. The additional requirement needs adding unfortunately.

[joshmoore]

Working again!