Iceraven-2.0.3

As you known, mozilla-mobile/fenix moves to a monorepo mozilla-mobile/firefox-android, I tried using git trick to maintain the current structure and it seems successful, but it may not be feasible in the future, anyway, this release based on fenix v111.1.1 and I bump the major version 😆

The default branch should change to iceraven, but I don't have enough permission to change repo settings, I email to @interfect to acquire for owner role, waiting for his reply