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!
switch (entry) {
          case 'react-native-renderer':
          case 'react-native-renderer/fabric':
            
            return 'react-reconciler/src/forks/ReactFiberErrorDialog.native.js';
          default:
            return null;
        }
      default:
        return null;
    }
  },
  'react-reconciler/src/ReactFiberHostConfig': (
    bundleType,
    entry,
    dependencies,
    moduleType
  ) => {
    if (dependencies.indexOf('react-reconciler') !== -1) {
      return null;
    }
    if (moduleType !== RENDERER && moduleType !== RECONCILER) {
      return null;
    }
    
    for (let rendererInfo of inlinedHostConfigs) {
      if (rendererInfo.entryPoints.indexOf(entry) !== -1) {
        return `react-reconciler/src/forks/ReactFiberHostConfig.${
          rendererInfo.shortName
        }.js`;