title: Cound not find icon react-fontawesome
body: <p>I have a project on React and I need to integrate FontAwesome to it. I found official <a href="https://github.com/FortAwesome/react-fontawesome" rel="noreferrer">library</a> and installed it as instructed in readme</p>
  
  <pre><code>$ npm i --save @fortawesome/fontawesome
  $ npm i --save @fortawesome/react-fontawesome
  </code></pre>
  
  <p>When I try to use it in my code like this:</p>
  
  <pre><code>&lt;FontAwesomeIcon icon='plus'/&gt;
  &lt;FontAwesomeIcon icon={['fa', 'coffee']}/&gt;
  </code></pre>
  
  <p>I am getting this error on the console:</p>
  
  <pre><code>Could not find icon {prefix: "fas", iconName: "plus"}
  Could not find icon {prefix: "fa", iconName: "coffee"}
  </code></pre>
  
  <p>I tried to include FontAwesome css link to head but it didn't help. I am using <code>npm v4.6.1</code>; <code>node v8.9.1</code>; <code>react v16.2</code>.</p>