pre-commit v1.16.0

Features

• Add support for prepare-commit-msg hook
  • #1004 PR by @marcjay.

Fixes

• Fix repeated legacy pre-commit install on windows
  • #1010 issue by @AbhimanyuHK.
  • #1011 PR by @asottile.
• Whitespace fixup
  • #1014 PR by @mxr.
• Fix CI check for working pcre support
  • #1015 PR by @myrheimb.

Misc.

• Switch CI from travis / appveyor to azure pipelines
  • #1012 PR by @asottile.