fixing backward compability

cdplib/ml_validation/cross_validate_with_fine_tuning.py

@@ -167,7 +167,7 @@ from itertools import zip_longest
 if (sys.version_info.major == 3) & (sys.version_info.minor >= 8):
     from typing import Callable, Dict, Iterable, Union
 else:
-    from typing_extensions import Callable, Dict, Iterable, Union
+    from typing_extensions import * #Callable, Dict, Iterable, Union
 
 from copy import deepcopy