Fix error where chat stops working if a user has no badges

src/components/TwitchChat.vue

@@ -75,7 +75,9 @@ export default {
       }
     },
     getBadges(message: { username: string, channel: string, message: string, messageType: string, tags: Record<string, string> }) {
-      let badges = message.tags.badges.split(',')
+      let badgesString = message.tags.badges
+      if (!badgesString) return;
+      let badges = badgesString.split(',')
       let formatedBadges = badges.map((badgeWithVersion) => {
         const [setId, version] = badgeWithVersion.split('/')
         return { setId, version }