Configring node js.

node_modules/core-js/library/modules/es7.math.umulh.js

@@ -0,0 +1,16 @@
+// https://gist.github.com/BrendanEich/4294d5c212a6d2254703
+var $export = require('./_export');
+
+$export($export.S, 'Math', {
+  umulh: function umulh(u, v){
+    var UINT16 = 0xffff
+      , $u = +u
+      , $v = +v
+      , u0 = $u & UINT16
+      , v0 = $v & UINT16
+      , u1 = $u >>> 16
+      , v1 = $v >>> 16
+      , t  = (u1 * v0 >>> 0) + (u0 * v0 >>> 16);
+    return u1 * v1 + (t >>> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >>> 16);
+  }
+});