Fix tests crash on SQLite without JSON1 extension. (#7409)

Author: felixxm

tests/test_serializer_nested.py

@@ -311,6 +311,9 @@ class NonRelationalPersonModel(models.Model):
         """Model declaring a postgres JSONField"""
         data = postgres_fields.JSONField()
 
+        class Meta:
+            required_db_features = {'supports_json_field'}
+
 
 @pytest.mark.skipif(not postgres_fields, reason='psycopg2 is not installed')
 class TestNestedNonRelationalFieldWrite: