Whitelist vendor chunk

vendor.js

/**
 * Core external dependencies to be cached in vendor js
 */
module.exports = [
  'babel-runtime',
  'buffer',
  'classnames',
  'core-js',
  'debug',
  'eventemitter3',
  'events',
  'fbjs',
  'history',
  'hoist-non-react-statics',
  'idb-keyval',
  'immutable',
  'intl-format-cache',
  'intl-messageformat-parser',
  'intl-messageformat',
  'intl-relativeformat',
  'lodash',
  'lodash-es',
  'normalizr',
  'raf',
  'react',
  'react-dom',
  'react-i13n',
  'react-intl',
  'react-redux',
  'react-router',
  'react-router-dom',
  'redux',
  'redux-persist',
  'redux-immutable',
  'redux-saga',
  'subscribe-ui-event',
  'whatwg-fetch',
  'ycb'
];