title: How to send Keyboard keys in protractor like TAB
body: <p>I need to select an element, send values to it, press tab and then send new values.</p>
  
  <p>I can select the element and send values to it but am not being able to send TAB from my keyboard and then send new value. </p>
  
  <p>I used ptor first but then it is being obsoleted, I now am trying to do same by using browser.key but its not working for me. </p>
  
  <p>Please Help ! </p>