fix(presenceUpdate): fire when only state/details change on an activi…

…ty (#5846)

src/structures/Presence.js

@@ -275,7 +275,12 @@ class Activity {
   equals(activity) {
     return (
       this === activity ||
-      (activity && this.name === activity.name && this.type === activity.type && this.url === activity.url)
+      (activity &&
+        this.name === activity.name &&
+        this.type === activity.type &&
+        this.url === activity.url &&
+        this.state === activity.state &&
+        this.details === activity.details)
     );
   }