fix: 补上sleep函数的实现

src/utils/helper.js

@@ -117,6 +117,10 @@ export function filterValidParams(params) {
   return _.pickBy(params, _.negate(_.isUndefined));
 }
 
+export async function sleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
 export async function tryIt(times, cb, delay) {
   let err;
   for (let i = 0; i < times; ++i) {
@@ -132,5 +136,5 @@ export async function tryIt(times, cb, delay) {
   if (err) {
     throw err;
   }
-};
+}