title: How to update phantomjs 1.9.8 to phantomjs 2.1.1 on ubuntu?
body: <p>I cant reinstall phantomjs 1.9.8 to 2.1.1 version on my ubuntu 16.04
  Please help. 
  1.9.8 give me an errors when I write a spin functions, in documentation see that this ploblem I can solve with reinstalation.</p>