all these changes

frontend/node_modules/core-js/internals/define-built-ins.js

@@ -0,0 +1,7 @@
+'use strict';
+var defineBuiltIn = require('../internals/define-built-in');
+
+module.exports = function (target, src, options) {
+  for (var key in src) defineBuiltIn(target, key, src[key], options);
+  return target;
+};