resolve django warnings for AutoField and default_app_config

Author: fopina

dbcleanup/__init__.py

@@ -1,3 +1,10 @@
 __version__ = '0.1.1'
 
-default_app_config = 'dbcleanup.apps.DBCleanupConfig'
+# set default_app_config when using django earlier than 3.2
+try:
+    import django
+
+    if django.VERSION < (3, 2):
+        default_app_config = 'dbcleanup.apps.DBCleanupConfig'
+except ImportError:
+    pass

dbcleanup/apps.py

@@ -11,6 +11,7 @@
 
 class DBCleanupConfig(AppConfig):
     name = 'dbcleanup'
+    default_auto_field = 'django.db.models.AutoField'
 
     def ready(self):
         super().ready()