Fix for device_state_attributes warnings

Fix device state attribute warnings that began in 2021.12.0b

custom_components/deepstack_object/image_processing.py

@@ -422,7 +422,7 @@ def should_poll(self):
         return False
 
     @property
-    def device_state_attributes(self) -> Dict:
+    def extra_state_attributes(self) -> Dict:
         """Return device specific state attributes."""
         attr = {}
         attr["targets"] = self._targets