Provide instructions for contributing
The README has a section "Hacking" that ends with: "Now you’re welcome to contribute your bits!". But there are no instructions for actually contributing something.
The obvious way would be to fork and submit a merge requests, but that's an option only for people who (1) have an account on this GitLab and (2) can fork the repository. I can't, for whatever reasons, probably related to the permissions of my account.