Add typing-extensions to test dependencies (#1586)

Author: DanielNoord

requirements_test_min.txt

@@ -1 +1,2 @@
 pytest
+typing-extensions>=3.10

tests/unittest_scoped_nodes.py

@@ -30,7 +30,7 @@
     util,
 )
 from astroid.bases import BoundMethod, Generator, Instance, UnboundMethod
-from astroid.const import IS_PYPY, PY38, PY38_PLUS, PY310_PLUS, WIN32
+from astroid.const import IS_PYPY, PY38, PY38_PLUS
 from astroid.exceptions import (
     AttributeInferenceError,
     DuplicateBasesError,
@@ -1897,10 +1897,6 @@ class Final(Base[object]): pass
         ]
         if not PY38_PLUS:
             class_names.pop(-2)
-        # typing_extensions is not installed on this combination of version
-        # and platform
-        if PY310_PLUS and WIN32:
-            class_names.pop(-2)
 
         final_def = module.body[-1]
         self.assertEqual(class_names, sorted(i.name for i in final_def.mro()))