title: How to change the display format of date in react-intl?
body: <p>I need to display the date using different separators using react-intl.
  So far I have this</p>
  
  <pre><code>const date = new Date("2016-08-12T16:59:02.013+02:00");
  ...
  return() {
     render(
        &lt;FormattedDate
              value={date}
              year='numeric'
              month='numeric'
              day='numeric'
            /&gt;
     )
  }
  </code></pre>
  
  <p>This renders the date <strong>8/12/2016</strong>, but I need to show it like this <strong>8-12-2016</strong>.
  How can this be done with FormattedDate? Or should I use a different approach?</p>