Update tests/test_options.py

Co-authored-by: Hayao <hayao_s@tokyo-gas.co.jp>

Author: csernazs

tests/test_options.py

@@ -5,7 +5,7 @@
 from pytest_httpserver import WaitingSettings
 
 
-def test_httpserver_options():
+def test_httpserver_options() -> None:
     options = ServerOptions(
         startup_timeout=60,
         threaded=True,