This action checks for available dependency updates to a repository full of simple homebrew formulae.
This is an abandoned tech demo. Compared to https://github.com/thepwagner/action-update-go and https://github.com/thepwagner/action-update-docker the implementation is brittle: based on regular expressions without evaluating the formula as code. Functionality is similar to https://github.com/thepwagner/action-update-dockerurl: find new versions, find new artifact SHASUMs.
The only novel feature is optional GPG signature verification of artifacts: this avoid running a potentially malicious release through the CI process.