title: Webpack output to es5 / es6?
body: <p>Is it possible have webpack output multiple ECMAScript versions?</p>
  
  <p>Something like:</p>
  
  <ul>
  <li>bundle5.js</li>
  <li>bundle6.js</li>
  </ul>
  
  <p><strong>EDIT:</strong></p>
  
  <p>What I mean, is wether Webpack can create both variants in one single run.</p>