title: Bootstrap Datetimepicker change event is not firing
body: <p>Bootstrap Datetimepicker  change event is not firing without errors. Any clue?</p>
  
  <p><a href="https://github.com/Eonasdan/bootstrap-datetimepicker/blob/master/docs/Events.md" rel="noreferrer">https://github.com/Eonasdan/bootstrap-datetimepicker/blob/master/docs/Events.md</a></p>
  
  <pre><code>$('#datetimepickerStart').datetimepicker();
  
  $('#datetimepickerStart').datetimepicker().on('change', function (ev) {
                  alert('!!!');
  
  });
  </code></pre>