Add type annotations

Author: JosiasAurel

testing/test_faulthandler.py

@@ -87,7 +87,7 @@ def test_timeout():
 
 
 @pytest.mark.parametrize("hook_name", ["pytest_enter_pdb", "pytest_exception_interact"])
-def test_cancel_timeout_on_hook(monkeypatch, hook_name):
+def test_cancel_timeout_on_hook(monkeypatch, hook_name) -> None:
     """Make sure that we are cancelling any scheduled traceback dumping due
     to timeout before entering pdb (pytest-dev/pytest-faulthandler#12) or any
     other interactive exception (pytest-dev/pytest-faulthandler#14)."""