I noticed we stopped providing it, but a bunch of fiddles for old bugs use it.
I wonder if we should add it back, e.g. as `react-dom-test-utils.development.js`.

Let’s hear what people have to say.
moduleType: RENDERER,
    entry: 'react-art',
    global: 'ReactART',
    externals: ['react'],
    babel: opts =>
      Object.assign({}, opts, {
        
        presets: opts.presets.concat([require.resolve('babel-preset-react')]),
      }),
  },
  
  {
    label: 'native',
    bundleTypes: [RN_DEV, RN_PROD],
    moduleType: RENDERER,
    entry: 'react-native-renderer',
    global: 'ReactNativeRenderer',
    externals: [
      'ExceptionsManager',
      'InitializeCore',
      'Platform',
      'RCTEventEmitter',
      'TextInputState',
      'UIManager',
      'View',
      'deepDiffer',
      'deepFreezeAndThrowOnMutationInDev',
      'flattenStyle',
    ],
  },