title: Angular downgrade from version 5 to 4
body: <p>i want to create angular 4 project instead of 5.
  my angular cli version 1.5.0
  when i run this command to downgrade the version to angular cli 4 </p>
  
  <pre><code>npm install -g angular-cli@1.4.9
  </code></pre>
  
  <p>I get the error</p>
  
  <pre><code>npm ERR! code ETARGET
  npm ERR! notarget No matching version found for angular-cli@1.4.9
  </code></pre>