add prettier

packages/artplayer-tool-thumbnail/src/utils.js

@@ -1,5 +1,5 @@
 export function sleep(ms) {
-    return new Promise(resolve => setTimeout(resolve, ms));
+    return new Promise((resolve) => setTimeout(resolve, ms));
 }
 
 export function runPromisesInSeries(ps) {
@@ -14,4 +14,4 @@ export function getFileName(name) {
 
 export function clamp(num, a, b) {
     return Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b));
-}
+}