extra_state_attributes requires Home Assistant 2021.4.0 or greater (custom-components#51)

pinkywafer · web-flow · commit c5eb6bbdac4d · 2021-12-17T18:24:56.000Z
ref home-assistant/core#47304
diff --git a/hacs.json b/hacs.json
@@ -2,5 +2,6 @@
   "name": "youtube",
   "zip_release": true,
   "filename": "youtube.zip",
-  "iot_class": "Cloud Poll"
+  "iot_class": "Cloud Poll",
+  "homeassistant": "2021.4.0"
 }
