title: How to give Rounded Border to Elevated Button in flutter?
body: <p>As <code>RaisedButton</code> and <code>OutlineButton</code> are deprecated, the flutter team introduces a new <code>ElevatedButton</code>. But I don't know how to make ElevatedButton's border rounded like the below image.</p>
  <p><a href="https://i.stack.imgur.com/oAgrM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oAgrM.png" alt="Rounded Border Button" /></a></p>
  <pre class="lang-dart prettyprint-override"><code>
  ElevatedButton(
    onPressed: () {},
    child: Text('Testing'),
  ),
  </code></pre>