implement fix

Author: weizman

snow.js

@@ -981,7 +981,7 @@ function forEachOpened(cb, arg1) {
   }
 }
 function proxy(opened) {
-  const target = new Object(null);
+  const target = Object.create(null);
   Object.defineProperty(target, 'closed', {
     get: function () {
       return opened.closed;