zulip_bots: Make typing import work in Python 3.5.

See python/mypy#1838.

Author: roberthoenig

zulip_bots/zulip_bots/run.py

@@ -9,7 +9,9 @@
 from types import ModuleType
 from importlib import import_module
 from os.path import basename, splitext
-from typing import Any, Optional, Text
+
+if False:
+    from typing import Any, Optional, Text
 
 from zulip_bots.lib import (
     run_message_handler_for_bot,