title: react-fontawesome importing all icons
body: <p>I'm trying to import just the fontawesome icons I need as the full library is 3mb. I've swapped to the <code>fontawesome-react</code> component to enable this but I'm not having much luck.</p>
  
  <p>Here's my test case:</p>
  
  <p>Package includes:</p>
  
  <pre><code>"@fortawesome/fontawesome-svg-core": "^1.2.4",
  "@fortawesome/pro-regular-svg-icons": "^5.3.1",
  "@fortawesome/react-fontawesome": "^0.1.3",
  </code></pre>
  
  <p>Component:</p>
  
  <pre><code>import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
  import { faThumbsUp } from '@fortawesome/pro-regular-svg-icons';
  
  // In Render:
  &lt;FontAwesomeIcon
      icon={ faThumbsUp }
  /&gt;
  </code></pre>
  
  <p>Results in an include size of 1MB
  Is this expected behaviour?</p>
  
  <p>It appears to be following the explicit import methodology - <a href="https://github.com/FortAwesome/react-fontawesome#user-content-explicit-import" rel="noreferrer">https://github.com/FortAwesome/react-fontawesome#user-content-explicit-import</a></p>
  
  <p><a href="https://i.stack.imgur.com/oisF3.png" rel="noreferrer"><img src="https://i.stack.imgur.com/oisF3.png" alt="Visualizer Result"></a></p>