title: Tree shaking create-react-app?
body: <p>I created my React app with <a href="https://github.com/facebookincubator/create-react-app" rel="noreferrer">create-react-app</a> and now use TypeScript with <a href="https://github.com/wmonk/create-react-app-typescript" rel="noreferrer">create-react-app-typescript</a>.</p>
  
  <p>Everything works ok, but the problem is - especially because I use the good but heavy <a href="https://github.com/callemall/material-ui" rel="noreferrer">material-ui</a> - the size of the built bundle is quite big - almost reaching 1MB.</p>
  
  <p>How can I use tree shaking tools (like in Webpack 2 or <a href="https://github.com/rollup/rollup" rel="noreferrer">rollup</a>?
  I don't want to <code>eject</code> already so seems like I don't really have access to the Webpack configuration.</p>
  
  <p>I wish it was possible to tree shake a minified code :)</p>
  
  <p>Thanks!</p>