fix: correct requestAnimationFrame fallback timing from 60ms to 16ms

src/Util.ts

@@ -429,7 +429,7 @@ var OBJECT_ARRAY = '[object Array]',
 const req =
   (typeof requestAnimationFrame !== 'undefined' && requestAnimationFrame) ||
   function (f) {
-    setTimeout(f, 60);
+    setTimeout(f, 16);  // 60fps ≈ 16.67ms per frame
   };
 /**
  * @namespace Util