Update graphql.py

Author: ic-dev21

pyhilo/graphql.py

@@ -548,6 +548,9 @@ async def subscribe_to_device_updated(
         self, location_hilo_id: str, callback: callable = None
     ) -> None:
         LOG.debug("subscribe_to_device_updated called")
+
+        #Setting log level to suppress keepalive messages on gql transport
+        logging.getLogger('gql.transport.websockets').setLevel(logging.WARNING)
         while True:  # Loop to reconnect if the connection is lost
             LOG.debug("subscribe_to_device_updated while true")
             access_token = await self._get_access_token()