composite action like reviewdog/action-flake8

[weargoggles]

I had difficulty building the Dockerfile based action on GitHub Enterprise.

Switching the action to be a composite action like reviewdog/action-flake8#28 made it work, and faster too.

[rickstaa]

@weargoggles Amazing. Thanks a lot for your contribution! I was planing to implement this but did not yet find the time to do so. I will test your PR somewhere this weekend.

[review-dog]

Hi, @weargoggles! We merged your PR to reviewdog! 🐶
Thank you for your contribution! ✨

We just invited you to join the @reviewdog organization on GitHub.
Accept the invite by visiting https://github.com/orgs/reviewdog/invitation.
By joining the team, you'll be a part of reviewdog community and can help the maintainance of reviewdog.

Thanks again!

[github-actions]

🚀 [bumpr] Bumped! New version:v3.0.0 Changes:v2.3.0...v3.0.0

[rickstaa]

@weargoggles Thanks again for your contribution and welcome to the Reviewdog team! Your changes are released under https://github.com/reviewdog/action-black/releases/tag/v3.0.0.