fix type-hint for verbose checker

Author: mscheltienne

template/utils/_checks.py

@@ -4,7 +4,7 @@
 import operator
 import os
 from pathlib import Path
-from typing import Any, Optional, Union
+from typing import Any, Optional
 
 import numpy as np
 
@@ -180,7 +180,7 @@ def _check_value(
 
 
 @fill_doc
-def _check_verbose(verbose: Union[bool, str, int, None]) -> int:
+def _check_verbose(verbose: Any) -> int:
     """Check that the value of verbose is valid.
 
     Parameters