title: Need help to make [create-react-app] to use Aync - Await (transform-async-to-generator)!
body: <p>I am new to [create-react-app] and I would like to find out how can I add : ["transform-async-to-generator"] to this build process? In regular cases I would add it in .babelrc, but does not look to work* with [create-react-app].</p>
  
  <p>*By "does not look to work" - I see the following error. </p>
  
  <pre><code>Syntax error: ../web/src/App.js: Unexpected token, expected ( (17:13)
  
    15 |   }
    16 |
  &gt; 17 |   test = async () =&gt; {
       |              ^
    18 |     let x = await this.resolveAfter2Seconds();
    19 |     try{}
    20 |     catch(exception){
  </code></pre>
  
  <p>And is any way to extend [create-react-app], without modifying the package itself?</p>
  
  <p>Thanks!</p>