Allow displaying version information derived from importlib.metadata by passing -V/ --version to the entrypoint.
Change the default behavior of the entrypoint to iterating over all configured projects if not specifying a project (using -p/ --project) and (optionally) the release to promote (using -r/ --release).
This eliminates the need for a required parameter and allows for a generic approach towards how to promote a release.
Fixes #5 (closed) Fixes #9 (closed)