title: React | Ant design select default value
body: <p>I'm using <a href="https://ant.design/" rel="noreferrer">ant design</a> in my project. </p>
  
  <p>Here I have a select as a dynamic field. when I trying to set default value for select. It doesn't work. </p>
  
  <pre><code>&lt;Select defaultValue="lucy"&gt;
    &lt;Option value="jack"&gt;Jack&lt;/Option&gt;
    &lt;Option value="lucy"&gt;Lucy&lt;/Option&gt;
    &lt;Option value="Yiminghe"&gt;yiminghe&lt;/Option&gt;
  &lt;/Select&gt;
  </code></pre>
  
  <p>I'm setting defaultvalue as <code>lucy</code> But it doesn't work</p>
  
  <p>Reproduction Code: <a href="https://codesandbox.io/s/6x3qv6wymr" rel="noreferrer">https://codesandbox.io/s/6x3qv6wymr</a></p>