title: npm conflicting peer dependency requirements installing PrimeNG into an Angular app
body: <p>I install primeng and get a peer dependency warning:</p>
  
  <pre><code>&gt;npm install primeng --save
  npm WARN primeng@9.0.2 requires a peer of zone.js@^0.10.2 but none is installed. You must install peer dependencies yourself.
  </code></pre>
  
  <p>So I dutifully install zone.js@^0.10.2 ...</p>
  
  <pre><code>&gt;npm install zone.js@^0.10.2 --save
  npm WARN @angular/core@8.0.0 requires a peer of zone.js@~0.9.1 but none is installed. You must install peer dependencies yourself.
  </code></pre>
  
  <p>... and now it complains that I need to install zone.js@~0.9.1. If I install that it complains that zone.js@^0.10.2 needs to be installed, and so on...</p>
  
  <p>What to do?
  Thanks</p>