The 16.5.0 package released to unpkg currently has the production/profiling variant present for cjs builds but there is no equivalent for umd builds. 

i.e. There is the file https://unpkg.com/react@16.5.0/cjs/react.profiling.min.js but there is no https://unpkg.com/react@16.5.0/umd/react.profiling.min.js

It would be great if a future release had the profiling variant packaged as umd as well.

Also thanks for the awesome framework!
if (moduleType === RECONCILER) {
    
    
    const wrapper = reconcilerWrappers[bundleType];
    if (typeof wrapper !== 'function') {
      throw new Error(
        `Unsupported build type for the reconciler package: ${bundleType}.`
      );
    }
    return wrapper(source, globalName, filename, moduleType);
  }
  
  const wrapper = wrappers[bundleType];
  if (typeof wrapper !== 'function') {
    throw new Error(`Unsupported build type: ${bundleType}.`);
  }
  return wrapper(source, globalName, filename, moduleType);
}
module.exports = {
  wrapBundle,
};