"delete" is not support

[Chen Ying]

delete is not support

[小弟调调]

@AntoninSorrento This is a compatibility issue. use backspace to achieve..

<Hotkeys 
  keyName="backspace" 
  onKeyDown={this.onKeyDown.bind(this)}
  onKeyUp={this.onKeyUp.bind(this)}
>
  test
</Hotkeys>