Update pre-commit to 2.7.1

[pyup-bot]

This PR updates pre-commit from 2.6.0 to 2.7.1.

Changelog

2.7.1

==================

Fixes
- Improve performance of docker hooks by removing slow `ps` call
 - 1572 PR by rkm.
 - 1569 issue by asottile.
- Fix un-`healthy()` invalidation followed by install being reported as
un-`healthy()`.
 - 1576 PR by asottile.
 - 1575 issue by jab.
- Fix rare file race condition on windows with `os.replace()`
 - 1577 PR by asottile.

2.7.0

==================

Features
- Produce error message if an environment is immediately unhealthy
 - 1535 PR by asottile.
- Add --no-allow-missing-config option to init-templatedir
 - 1539 PR by singergr.
- Add warning for old list-style configuration
 - 1544 PR by asottile.
- Allow pre-commit to succeed on a readonly store.
 - 1570 PR by asottile.
 - 1536 issue by asottile.

Fixes
- Fix error messaging when the store directory is readonly
 - 1546 PR by asottile.
 - 1536 issue by asottile.
- Improve `diff` performance with many hooks
 - 1566 PR by jhenkens.
 - 1564 issue by jhenkens.

Links

• PyPI: https://pypi.org/project/pre-commit
• Changelog: https://pyup.io/changelogs/pre-commit/
• Repo: https://github.com/pre-commit/pre-commit

[pyup-bot]

Closing this in favor of #270