Fix to async

Author: bouwew

plugwise_usb/nodes/circle.py

@@ -181,7 +181,7 @@ def relay_lock(self) -> bool:
         """State of the relay lock."""
         return self._relay_lock
 
-    def set_relay_lock(self, state: bool) -> None:
+    async def set_relay_lock(self, state: bool) -> None:
         """Set the state of the relay-lock."""
         self._relay_lock = state
         await self.publish_feature_update_to_subscribers(