Mark D7 submodule migrations as finished

This is the last item that needs to be done before the migration path will be complete: 📌 Migrations: Metatag-D7 default configurations Fixed

Bumping to the v2 branch.

Let's include this in 2.1.0

Nothing left to commit here, all of the main submodules are now migrated.

Automatically closed - issue fixed for 2 weeks with no activity.