Expand `file_pattern`-input to an array
- refs #196
I've tested this change in my test repository here: https://github.com/stefanzweifel/git-auto-commit-action-demo-app/pull/35
The file_pattern works much better now, but there is still an issue with globbing: If an untouched file that matches the pathspec is in the repository, the Action still fails with a Working tree clean. Nothing to commit.-mesage.
However, this can be resolved by adding disable_globbing: true to a workflow.
(Globbing is not disabled by default, due to the fear of breaking the workflow of others. See https://github.com/stefanzweifel/git-auto-commit-action/pull/154 for details.)
I'm gonna merge this PR to master now. A new version will be tagged after 5-6 days, if no bug reports are coming in.