So siehts ganz gut aus !

node_modules/core-js/modules/_redefine-all.js

@@ -0,0 +1,5 @@
+var redefine = require('./_redefine');
+module.exports = function (target, src, safe) {
+  for (var key in src) redefine(target, key, src[key], safe);
+  return target;
+};