format: remove unnecessary async keyword

lib/Livechat.js

@@ -23,7 +23,7 @@ class Livechat extends EventEmitter {
   }
   
   enqueueActionGroup(group) {
-    group.forEach(async (action) => {
+    group.forEach((action) => {
       if (!action.addChatItemAction) return; //TODO: handle different action types 
       const message_content = action.addChatItemAction.item.liveChatTextMessageRenderer;
       if (!message_content) return;