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!
const peerGlobals = {};
  externals.forEach(name => {
    if (
      !knownGlobals[name] &&
      (bundleType === UMD_DEV || bundleType === UMD_PROD)
    ) {
      throw new Error('Cannot build UMD without a global name for: ' + name);
    }
    peerGlobals[name] = knownGlobals[name];
  });
  return peerGlobals;
}
function getDependencies(bundleType, entry) {
  
  
  const packageJson = require(entry.replace(/(\/.*)?$/, '/package.json'));
  
  return Array.from(
    new Set([
      ...Object.keys(packageJson.dependencies || {}),
      ...Object.keys(packageJson.peerDependencies || {}),
    ])
  );
}
function getForks(bundleType, entry, moduleType) {