Bump version 11.0.0 → 12.0.0

Breaking changes
----------------

* Drop Python 3.7 support

fastapi_users/__init__.py

@@ -1,6 +1,6 @@
 """Ready-to-use and customizable users management for FastAPI."""
 
-__version__ = "11.0.0"
+__version__ = "12.0.0"
 
 from fastapi_users import models, schemas  # noqa: F401
 from fastapi_users.exceptions import InvalidID, InvalidPasswordException