ci: adds autogen node script (#220)
ci: adds autogen node script (#220)

Per the unmarshal autogen plan, this GitHub workflow runs the generator for the Node client and generates a PR for that Node repo if there is a non-0 diff whenever we push an update to the default branch of this repo.

Please treat the versioning question separate from this PR.
googleapis/google-cloudevents,googleapis/google-cloudevents,googleapis/google-cloudevents