title: Why does JSHint throw a warning if I am using const?
body: <p>This is the error I get when using const:</p>
  
  <pre><code>&lt;error line="2" column="1" severity="warning" message="&amp;apos;const&amp;apos; is available in ES6 (use esnext option) or Mozilla JS extensions (use moz)." source="jshint.W104" /&gt;
  </code></pre>
  
  <p>My code looks like this:</p>
  
  <pre><code>const Suites = {
      Spade: 1,
      Heart: 2,
      Diamond: 3,
      Club: 4
  };
  </code></pre>
  
  <p>The code works fine only JSHint is warning me every time.</p>