react and react-dom have both cjs and umd versions available.

Is it possible to create a umd version of react-test-renderer as well?
Object.assign({}, opts, {
        plugins: opts.plugins.concat([
          require.resolve('babel-plugin-transform-regenerator'),
        ]),
      }),
  },
  
  {
    label: 'react-reconciler',
    bundleTypes: [NODE_DEV, NODE_PROD],
    moduleType: RECONCILER,
    entry: 'react-reconciler',
    global: 'ReactReconciler',
    externals: ['react'],
  },
  
  {
    label: 'react-reconciler-persistent',
    bundleTypes: [NODE_DEV, NODE_PROD],
    moduleType: RECONCILER,
    entry: 'react-reconciler/persistent',
    global: 'ReactPersistentReconciler',
    externals: ['react'],
  },
  
  {
    label: 'reconciler-reflection',
    moduleType: RENDERER_UTILS,
    bundleTypes: [NODE_DEV, NODE_PROD],
    entry: 'react-reconciler/reflection',