title: How to run gulp with --harmony flag?
body: <p>The same could be achieved in node.js using <code>--harmony</code> flag like this:</p>
  
  <pre><code>node --harmony app.js
  </code></pre>
  
  <p>So it will be add support for EcmaScript6.</p>
  
  <p>How to run gulp commands with harmony flag?</p>