8.1.6

This is a fix release for the 8.1.x feature branch. If you were having issues with type checking tools like pyright or mypy not accepting uses of Click's decorators, this should fix that.

• Changes: https://click.palletsprojects.com/en/8.1.x/changes/#version-8-1-6
• Milestone: https://github.com/pallets/click/milestone/21?closed=1