fix udate

src/handlers/messages/MESSAGE_UPDATE.ts

@@ -5,5 +5,7 @@ import { SnakeCasedPropertiesDeep } from "../../types/util.ts";
 
 export async function handleMessageUpdate(bot: Bot, data: DiscordGatewayPayload) {
   const payload = data.d as SnakeCasedPropertiesDeep<Message>;
+  if (!payload.edited_timestamp) return;
+
   bot.events.messageUpdate(bot, bot.transformers.message(bot, payload));
 }