title: Nativescript installer won't install above 4.1.2
body: <p>If I run <code>npm uninstall -g nativescript</code> and then <code>npm install -g nativescript</code> it installs 4.1.2 and not the latest version 5.4.2.</p>
  
  <p>I've tried to upgrade my nativescript by re-installing, but it still won't upgrade, does anyone have any ideas?</p>