if (!global.Promise) global.Promise = require('promise-polyfill');
if (!global.fetch) global.fetch = require('isomorphic-unfetch');

if (!global.Promise) global.Promise = require('promise-polyfill').default;
if (!global.fetch) global.fetch = require('isomorphic-unfetch');

Fix Promise polyfill not working in IE11
Fix Promise polyfill not working in IE11

It was just a wrong import path.
