Update index.js

index.js

@@ -195,7 +195,7 @@ async function acytoo(text, model) {
   return res.data
 }
 function waifu2x(urls, formats) {
-  return new Promise(async (resolve)) => {
+  return new Promise(async (resolve)) {
     // data
   let img = await axios.get(urls, { responseType: "arraybuffer"})
   let format