title: react-native-datepicker change the input format
body: <p>Is there a way to change the modal format on the <code>react-native-datepicker</code>? I am not seeing anything in the documentation or questions / issues in the repo. </p>
  
  <p><a href="https://github.com/xgfe/react-native-datepicker" rel="nofollow noreferrer">https://github.com/xgfe/react-native-datepicker</a></p>
  
  <p>Everything is working as expected just curious if I could format it with the year scrollable first, then the day, then the month. I am not talking about the place holder which can be formatted with the "format" attribute. I am talking about the modal that allows you to select the date. </p>
  
  <pre><code>&lt;DatePickerModal
      ref={datePickerRef}
      date={value}
      mode="date"
      placeholder="Select date"
      format="YYYY-MM-DD"
      maxDate={moment().subtract(18, "years")}
      confirmBtnText="Confirm"
      cancelBtnText="Cancel"
      showIcon={false}
      customStyles={dateInputStyles}
      onDateChange={onDateChange}
    /&gt;
  </code></pre>