Express addition

node_modules/core-js/modules/core.delay.js

@@ -0,0 +1,12 @@
+var global = require('./_global');
+var core = require('./_core');
+var $export = require('./_export');
+var partial = require('./_partial');
+// https://esdiscuss.org/topic/promise-returning-delay-function
+$export($export.G + $export.F, {
+  delay: function delay(time) {
+    return new (core.Promise || global.Promise)(function (resolve) {
+      setTimeout(partial.call(resolve, true), time);
+    });
+  }
+});