fix api.md docs

docs/api.md

@@ -3,6 +3,7 @@
 
 class App:
     def __init__(self, options=None):
+    def register(self, extension):
     def template(self, template_engine):
     def json_serializer(self, json_serializer):
     def static(self, route, directory):

src/tests.py

@@ -41,8 +41,7 @@ app.listen(
 )
 app.run()
 
-# uws_websocket_upgrade_handler
+
-# uws_generic_method_handler
 # uws_websocket_drain_handler
 # uws_websocket_subscription_handler
 # uws_websocket_open_handler
@@ -50,4 +49,3 @@ app.run()
 # uws_websocket_pong_handler
 # uws_websocket_ping_handler
 # uws_websocket_close_handler
-# uws_websocket_subscription_handler