title: How to use " null "data in "react-native-datepicker" ? I want to use null data if user want
body: <p>I am creating a mobile app for iOS and Android.
  Now I want to make user use null data or date but I don't mean that I want to use PlaceHolder.</p>
  
  <p>I mean user can select "null" or specific date like "11-30-2018".</p>
  
  <p><strong>Using component :</strong></p>
  
  <p>react-native-datepicker
  <a href="https://github.com/xgfe/react-native-datepicker" rel="nofollow noreferrer">https://github.com/xgfe/react-native-datepicker</a></p>
  
  <p>Could someone please teach me that.</p>