Handle deprecating set-output

Merge pull request #5 from dysonfrost/deprecated_gh_actions_set_output

Redirect outputs to GITHUB_OUTPUT

Fall back to plain merge-base when fork-point fails

v0.1.3

Fall back to plain merge-base if --fork-point fails

Fix path specification

It is now possible to use multiple path arguments

Updated documentation and publishing

v0.1.1

Add branding

Basic initial version

v0.1

Provide bare action implementation