title: Hook (specifically postinstall) after any npm install command
body: <p>Using NPM at the command line, is there some official hook that I can configure, which means that for any <code>npm install</code> command (including <code>npm install x</code>), a certain hook is run?</p>
  
  <p>Right now, I see certain limitations -</p>
  
  <p>if I run <code>npm install x</code> it will not run hooks for another dependency (obviously) but it also doesn't seem to run hooks for the main/parent package.</p>
  
  <p>Plain old <code>npm install</code> will run preinstall / postintall hooks for the main/parent package.</p>