This PR follows directions in this blog post: https://federicoterzi.com/blog/how-to-publish-your-rust-project-on-homebrew/

Today, when there is a new release of packwerk, we can update Formula/packs.rb by hand. To do this, replace the version in packs.rb with the version in the newest release, download the tarball, then run shasum -a 256 path/to/tarball.tar.gz and replace the value of sha256 in packs.rb with the output of that command.

Eventually, we can change ci.yml in https://github.com/alexevanczuk/packs so that it pushes a new Formula/packs.rb directly to this repo.

Then the user can install with:

brew tap alexevanczuk/packs
brew install packs