core: revert django update (#5236)

* Revert "core: bump django from 4.1.7 to 4.2 (#5151)"

This reverts commit 18a4eac527.

* run unittests with postgres 11 and 12

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

lifecycle/migrate.py

@@ -6,7 +6,7 @@ from inspect import getmembers, isclass
 from pathlib import Path
 from typing import Any
 
-from psycopg import connect
+from psycopg2 import connect
 from structlog.stdlib import get_logger
 
 from authentik.lib.config import CONFIG

lifecycle/wait_for_db.py

@@ -5,7 +5,7 @@ from sys import exit as sysexit
 from time import sleep
 from urllib.parse import quote_plus
 
-from psycopg import OperationalError, connect
+from psycopg2 import OperationalError, connect
 from redis import Redis
 from redis.exceptions import RedisError