title: How to make icon spin in react-native-paper?
body: <p>I am having this <code>react-native-paper</code> button:</p>
  
  <pre><code>      &lt;Button
          disabled={loading}
          icon="refresh"
          mode="contained"
          onPress={this.refreshData.bind(this)}
        &gt;
          Refresh
        &lt;/Button&gt;
  </code></pre>
  
  <p>How can I make the icon spin when <code>loading=true</code>?</p>