Add TODO related to dropping the entire test module

Author: ivanovmg

tests/test_typeclass/test_typed_dict.py

@@ -8,6 +8,7 @@
 if sys.version_info[:2] >= (3, 9):  # noqa: C901
     pytestmark = pytest.mark.skip('Only python3.7 and python3.8 are supported')
 else:
+    # TODO drop it completely since classes support Python 3.10+
     class _User(TypedDict):
         name: str
         registered: bool