title: How do I install gulp 4
body: <p>I've been using gulp-watch. The current version of gulp-watch relies on the call gulp.parrallel. This call is only available from gulp 4.</p>
  
  <p>However gulp 4 is not available via the npm repo. 
  <code>npm info gulp dist-tags</code> returns: <code>{ latest: '3.9.0' }</code>.</p>
  
  <p>I can see that there is a 4.0 branch within the git repo. But attempting to install it with variations on this command fails: <code>npm install https://github.com/gulpjs/gulp#v4.0.0</code>.</p>