title: npm WARN optional SKIPPING OPTIONAL DEPENDENCY not getting suppressed
body: <p>I am working on angular 7 application and get optional dependency warning while doing npm install. What I gather is that the following command should be used to not get those warnings but still seem to get. I have ensured that pacakge-lock and shrinkwrap files dont exist in the folder.</p>
  
  <pre><code>npm install --no-optional --no-shrinkwrap --no-package-lock
  </code></pre>
  
  <p>Warning messages</p>
  
  <p><a href="https://i.stack.imgur.com/jlWcF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jlWcF.png" alt="enter image description here"></a></p>