feat: unpublish action

[igorpupkinable]

Introduce unpublish action.

[igorpupkinable]

Previous build is passing. This one fails because of Docker pull limit.

toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit

error Command failed with exit code 1.

@bufferoverflow please see https://www.docker.com/blog/checking-your-current-docker-pull-rate-limits-and-status/

[bufferoverflow]

Thanks @igorpupkinable ! Could you please remove the version bump as this is done automatically with https://github.com/bufferoverflow/verdaccio-gitlab#create-a-release

[igorpupkinable]

The package will be unpublished successfully, but you will still see 403 Forbidden - DELETE error due to #1629 issue.

[bufferoverflow]

thanks @igorpupkinable ! let's wait until https://github.com/verdaccio/verdaccio/issues/1629 is fixed.

[juanpicado]

🤔 I didn't realise you were waiting for https://github.com/verdaccio/verdaccio/issues/1629 I'll put it on my list.