title: Migration of PrimeFaces from version x a newer version
body: <p>Is there any guide on migrating / updating / upgrading PrimeFaces from 7.0 to the latest 8 version?</p>
  <p>I am using the PrimeFaces Sapphire template, which works fine with PrimeFaces 7.0. But on migrating to latest 8 version, I have compilation problems concerning the PrimeFaces <code>UploadedFile</code> model.</p>