Releases are automated through .github/workflows/release-updates.yaml.
To cut a release, visit the projects releases
page where
you create a new GitHub release. Enter a tag name and release name of
"vX.Y.Z". Doing so will automatically update the "vX" branch allowing users to
reference this action with jupyterhub/repo2docker-action@vX.
If you are to cut a major release, make sure to also update references to the
@vX branch to the @vX+1 branch.