title: Ant design 3 Year picker selected value not display
body: <p>Im using  react type script project for <strong><a href="https://3x.ant.design/components/date-picker/" rel="nofollow noreferrer">ant design3 date picker</a></strong>, they are not provided year picker and i got a some solution and is it here   <code>mode=&quot;year&quot;</code>, then year picker is working but cant bind the value , selected year not display. any one know some solution for this?</p>
  <p><strong><a href="https://stackblitz.com/edit/react-zfhaoi?file=index.js" rel="nofollow noreferrer">stack blitz here</a></strong></p>
  <p>Thanks</p>
  <p><strong>code here</strong></p>
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  import 'antd/dist/antd.css';
  import './index.css';
  import { DatePicker } from 'antd';
  
  const { MonthPicker, RangePicker, WeekPicker, } = DatePicker;
  
  function onChange(date, dateString) {
    console.log(date, dateString);
  }
  
  ReactDOM.render(
    &lt;div&gt;
      &lt;DatePicker onChange={onChange} mode=&quot;year&quot; placeholder=&quot;Select year&quot;/&gt;
      &lt;br /&gt;
          &lt;br /&gt;
     
  
    &lt;/div&gt;,
    document.getElementById('container'),
  );
  </code></pre>