Bump mypy to 0.981 (#8796)

stubs/keyboard/@tests/stubtest_allowlist.txt

@@ -4,14 +4,5 @@ keyboard._keyboard_event.KeyboardEvent.scan_code
 # Defaults don't align with possible values
 keyboard.mouse.on_button
 keyboard.mouse.wait
-# Private modules and tests
+# TODO: Should this be allowlisted?
 keyboard.__main__
-keyboard._darwinkeyboard
-keyboard._darwinmouse
-keyboard._keyboard_tests
-keyboard._mouse_tests
-keyboard._nixcommon
-keyboard._nixkeyboard
-keyboard._nixmouse
-keyboard._winkeyboard
-keyboard._winmouse