title: Angualar2 & Stylelint: Unexpected unknown pseudo-class selector ":host"
body: <p>How can I teach Stylelint Angular's selector ":host" ?</p>
  
  <p>E.g. <a href="https://github.com/mgechev/angular2-seed" rel="noreferrer">Angular2-Seed by MGechev</a> shows in its build-process ":host" as error:</p>
  
  <pre><code>src/client/app/+home/home.component.css
  1:1     ‼  Unexpected unknown pseudo-class selector 
          ":host" (selector-pseudo-class-no-unknown) [stylelint]
  </code></pre>