CI on GitHub Actions

[amatsuda]

Here's an attempt to run the CI on GitHub Actions.

Ruby versions in the matrix covers all tested versions on the previous Travis one, plus, 3.0 and 3.1 that were not tested on Travis.

[amatsuda]

Maybe Actions has to be enabled at the repo setting? https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/enabling-features-for-your-repository/managing-github-actions-settings-for-a-repository

[petergoldstein]

You may want to:

1. Add Ruby 3.2 to the matrix
2. Consider using the bundler-cache option on ruby/setup-ruby over running bundle manually since it better handles using compatible bundler versions.

[amatsuda]

@petergoldstein Did so! (I don't think that ruby 1.x would run on GHA though)

[petergoldstein]

@amatsuda Very possibly not. Honestly at this point I'd move the minimum cutoff to 2.2 or possibly even a more recent version.