Homebrew tap

[mmiranda]

This PR address #135

Since Goreleaser already has a brew step feature we can take advantage of it.

Requirements:

• @kovetskiy needs to create a new repo named homebrew-mark which will be used to store the tap
• Make sure the secrets.TOKEN used in your Github actions has permissions to write on that repo

How does it work?

1. You create a new tag and push it, and your Github actions will trigger goreleaser (it already happens today)
2. Goreleaser build the application and upload binaries to the release (also happening today)
3. Go release go further and create a new commit in the new repo homebrew-mark
4. Mac and Linux users profit

[kovetskiy]

Thanks again for your contributions and patience!