title: Cannot use react-intl-webpack-plugin with create-react-app
body: <p>I want to use react-intl-webpack-plugin to combine messages from babel-plugin-react-intl into one message file. I have configured the webpack.config.dev.js, however, when I run "yarn start", I got the following error:</p>
  
  <pre><code>Cannot read property 'compilation' of undefined
  </code></pre>
  
  <p>I setup react-intl-webpack-plugin according to the instructions. Related configurations in webpack.config.dev.js is shown as following:</p>
  
  <pre><code>const ReactIntlPlugin = require('react-intl-webpack-plugin');
  ...
  module.exports = {
    ...
    resolve: {
      ...
      plugins: [
        new ReactIntlPlugin()
      ],
    },
    module: {
      ...
      // Process JS with Babel.
      {
        test: /\.(js|jsx|mjs)$/,
        include: paths.appSrc,
        loader: require.resolve('babel-loader'),
        options: {
          cacheDirectory: true,
          metadataSubscribers: [ReactIntlPlugin.metadataContextFunctionName],
          presets: ['env', 'react-app'],
          plugins: [
            'transform-runtime',
            ['react-intl', {
              'messagesDir': './public/messages/',
              'enforceDescriptions': false
            }]
          ]
        },
  ...
  </code></pre>
  
  <p>My project is created by create-react-app and then ejected. The version of webpack and react-intl-webpack-plugin are 3.8.1 and 0.3.0 respectively.</p>
  
  <p>Thank you.</p>