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.
const RENDERER = moduleTypes.RENDERER;
const RENDERER_UTILS = moduleTypes.RENDERER_UTILS;
const RECONCILER = moduleTypes.RECONCILER;
const bundles = [
  
  {
    label: 'core',
    bundleTypes: [UMD_DEV, UMD_PROD, NODE_DEV, NODE_PROD, FB_DEV, FB_PROD],
    moduleType: ISOMORPHIC,
    entry: 'react',
    global: 'React',
    externals: [],
  },
  
  {
    label: 'dom-client',
    bundleTypes: [UMD_DEV, UMD_PROD, NODE_DEV, NODE_PROD, FB_DEV, FB_PROD],
    moduleType: RENDERER,
    entry: 'react-dom',
    global: 'ReactDOM',
    externals: ['react'],
  },
  
  {
    label: 'dom-test-utils',
    moduleType: RENDERER_UTILS,
    bundleTypes: [FB_DEV, NODE_DEV, NODE_PROD],
    entry: 'react-dom/test-utils',
    global: 'ReactTestUtils',
    externals: ['react', 'react-dom'],