fixup! [FIX] pydantic: Makes issubclass on BaseModel working with generics

Author: lmignon

pydantic/tests/test_pydantic.py

@@ -1,7 +1,12 @@
 # Copyright 2021 ACSONE SA/NV
 # License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html)
 
-from typing import List, Literal
+from typing import List
+
+try:
+    from typing import Literal
+except ImportError:
+    from typing_extensions import Literal
 
 import pydantic