Add babel-polyfill

package.json

@@ -20,6 +20,7 @@
   },
   "dependencies": {
     "antd": "^3.0.0-beta.1",
+    "babel-polyfill": "^6.26.0",
     "babel-runtime": "^6.9.2",
     "classnames": "^2.2.5",
     "core-js": "^2.5.1",

src/polyfill.js

 import 'core-js/es6/map';
 import 'core-js/es6/set';
+import 'babel-polyfill';
 
 global.requestAnimationFrame =
   global.requestAnimationFrame || function requestAnimationFrame(callback) {