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?
{
    label: 'create-subscription',
    bundleTypes: [NODE_DEV, NODE_PROD],
    moduleType: ISOMORPHIC,
    entry: 'create-subscription',
    global: 'createSubscription',
    externals: ['react'],
  },
];
function deepFreeze(o) {
  Object.freeze(o);
  Object.getOwnPropertyNames(o).forEach(function(prop) {
    if (
      o[prop] !== null &&
      (typeof o[prop] === 'object' || typeof o[prop] === 'function') &&
      !Object.isFrozen(o[prop])
    ) {
      deepFreeze(o[prop]);
    }
  });
  return o;
}
deepFreeze(bundles);
module.exports = {
  bundleTypes,
  moduleTypes,
  bundles,
};