Release procedure (for developers):

Check open issues and outstanding pull requests
Confirm make test passes
- check with multiple zsh versions
Update changelog.md
Remove -dev suffix from ./.version; Commit that; Tag it using git tag $(<.version); Increment ./.version and restore the -dev suffix; Commit that.
Push with git push --tags
Notify downstreams (OS packages)
- anitya should autodetect the tag