Fix requests session hooks type

Author: garrettheel

third_party/2and3/requests/sessions.pyi

@@ -1,6 +1,6 @@
 # Stubs for requests.sessions (Python 3)
 
-from typing import Any, Union, MutableMapping, Text, Optional, IO, Tuple, Callable
+from typing import Any, Union, List, MutableMapping, Text, Optional, IO, Tuple, Callable
 from . import adapters
 from . import auth as _auth
 from . import compat
@@ -56,7 +56,7 @@ class SessionRedirectMixin:
     def rebuild_proxies(self, prepared_request, proxies): ...
 
 _Data = Union[None, bytes, MutableMapping[Text, Text], IO]
-_Hooks = MutableMapping[Text, Callable[[Response], Any]]
+_Hooks = MutableMapping[Text, List[Callable[[Response], Any]]]
 
 class Session(SessionRedirectMixin):
     __attrs__ = ...  # type: Any