Fix #4513: Set up `versionScheme` for all the "library" artifacts.
Fix #4513: Set up `versionScheme` for all the "library" artifacts.

We do not set the version scheme for "tools" artifacts yet, as the
jury is still out on what is the best way to specify them.

scala-js/scala-js,sjrd/scala-js,gzm0/scala-js,sjrd/scala-js,scala-js/scala-js,gzm0/scala-js,scala-js/scala-js,sjrd/scala-js