Use collections.abc.Callable instead of typing.Callable (#53)

`typing.Callable` has been deprecated since Python 3.9. Switch to
`collections.abc.Callable`. Also switch to `collections.abc.Generator`
and `collections.abc.Iterable`.

src/rapids_pre_commit_hooks/copyright.py

@@ -18,7 +18,8 @@
 import os
 import re
 import warnings
-from typing import Callable, Optional, Union
+from collections.abc import Callable
+from typing import Optional, Union
 
 import git
 

src/rapids_pre_commit_hooks/lint.py

@@ -19,7 +19,8 @@
 import functools
 import re
 import warnings
-from typing import Callable, Generator, Iterable, Optional
+from collections.abc import Callable, Generator, Iterable
+from typing import Optional
 
 from rich.console import Console
 from rich.markup import escape