title: xgboost pckage for python 3.6
body: <p>I am trying in install xgboost0.72 in window and python 3.6.5
  It shows me the following error:</p>
  
  <blockquote>
    <p>xgboost-0.72-cp37-cp37m-win32.whl is not a supported wheel on this platform.</p>
  </blockquote>
  
  <p>Can anyone help me out which version of xgboost is compatible with python 3.6.5.
  Thanks
  zep</p>