v1.3.0

Update repository name to actually match what this repo is about.

It's possible that Unity will FAIL to update this package due to the name change. In which case, you need to REMOVE the previous package and ADD the newest one. This may require manually going in to your Packages/manifest.json and removing the old version.

The name change will not break any existing shader graphs generated using this repo, since the .meta GUIDs are the same as they were.

Full Changelog: v1.2.0...v1.3.0