title: Yarn start doesn't work with react-app-rewired
body: <p>When I run yarn start, I get the following output</p>
  
  <pre><code>$ yarn start
  yarn run v1.15.2
  $ react-app-rewired start
  The "injectBabelPlugin" helper has been deprecated as of v2.0. You can use customize-cra plugins in replacement - https://github.com/arackaf/customize-cra#available-plugins
  error Command failed with exit code 1.
  info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
  </code></pre>
  
  <p>I tried reading the document at: <a href="https://github.com/arackaf/customize-cra#available-plugins" rel="nofollow noreferrer">https://github.com/arackaf/customize-cra#available-plugins</a> but since I am new to React and npm, it didn't make much sense to me and I don't know which plugin to replace the deprecated helper with</p>
  
  <p>my <code>config-overrides.js</code> looks like:</p>
  
  <pre><code>const { injectBabelPlugin } = require('react-app-rewired');
  const rewireLess = require('react-app-rewire-less');
  
  module.exports = function override(config, env) {
     config = injectBabelPlugin(['import', { libraryName: 'antd', style: true }], config);  // change importing css to less
     config = rewireLess.withLoaderOptions({
         modifyVars: {
             "@primary-color": "#1DA57A"
         },
     })(config, env);
      return config;
  };
  </code></pre>