added fetch dependency

bot.js

@@ -2,6 +2,7 @@
 const Discord = require('discord.js');
 const auth = require('./auth.json');
 const XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
+import "isomorphic-fetch";
 
 // voice setup
 var playQueue = [];

package.json

@@ -6,7 +6,9 @@
   "author": "Daniel",
   "dependencies": {
     "discord.js": "^11.4.2",
+    "es6-promise": "^4.2.5",
     "ffmpeg-binaries": "^3.2.2",
+    "isomorphic-fetch": "^2.2.1",
     "node-opus": "^0.2.9",
     "xmlhttprequest": "^1.8.0"
   }