Add dry-run feature

This release adds a new dry-run feature that allows you to check if the action will try to publish. This can come in handy if you want to test out your setup without worrying about a publish happening, or if you want to perform a pre-publish action. See #10.

1.0.2

Fixed

• The default branch (for example, main) is now used to check whether this action should publish. Before it only published if it was on a branch called master. See #7.
• The action will now log all reasons that it isn't publishing yet to give more context.

1.0.1

• Make sure to fetch tags after creating a tag
• Add an optional path-to-compiler input

Initial release

Currently assumes that you're using your package.json to manage your Elm version. Maybe become customizable in a future release.