Apply rest arguments transform.

_shortOut.js

@@ -18,19 +18,19 @@ function shortOut(func) {
   var count = 0,
       lastCalled = 0;
 
-  return function() {
+  return function(...args) {
     var stamp = nativeNow(),
         remaining = HOT_SPAN - (stamp - lastCalled);
 
     lastCalled = stamp;
     if (remaining > 0) {
       if (++count >= HOT_COUNT) {
-        return arguments[0];
+        return args[0];
       }
     } else {
       count = 0;
     }
-    return func(...arguments);
+    return func(...args);
   };
 }