title: How to add type: date for react-jsonschema-form
body: <p>Using this library: <a href="https://github.com/mozilla-services/react-jsonschema-form" rel="nofollow noreferrer">https://github.com/mozilla-services/react-jsonschema-form</a> I want to add a date selector field and here in the documentation is says:</p>
  
  <pre><code>date: By default, an input[type=date] element is used;
  date-time: By default, an input[type=datetime-local] element is used.
  </code></pre>
  
  <p>and they posted this picture, I want mine to look the same as the date one:</p>
  
  <p><a href="https://i.stack.imgur.com/k8oPA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/k8oPA.png" alt="enter image description here"></a></p>
  
  <p>I use last version of Chrome, for the compatibility issue. </p>
  
  <p>I've try to write something like this:</p>
  
  <pre><code>date: {
         type: "date",
         title: "Date"
          }
  </code></pre>
  
  <p>but I got this error: </p>
  
  <blockquote>
    <p>Unsupported field schema for field root_date: Unknown field type date.</p>
  </blockquote>
  
  <p>Check this fiddle:</p>
  
  <p><a href="https://jsfiddle.net/bogdanul11/69z2wepo/91003/" rel="nofollow noreferrer">https://jsfiddle.net/bogdanul11/69z2wepo/91003/</a></p>