add subscribing to user entity normalizer

src/services/entity_normalizer/entity_normalizer.service.js

@@ -68,6 +68,7 @@ export const parseUser = (data) => {
         output.following = relationship.following
         output.statusnet_blocking = relationship.blocking
         output.muted = relationship.muting
+        output.subscribing = relationship.subscribing
       }
 
       output.hide_follows = data.pleroma.hide_follows