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 containsThisModule = pkg => id === pkg || id.startsWith(pkg + '/');
      const isProvidedByDependency = externals.some(containsThisModule);
      if (!shouldBundleDependencies && isProvidedByDependency) {
        return true;
      }
      return !!peerGlobals[id];
    },
    onwarn: handleRollupWarning,
    plugins: getPlugins(
      bundle.entry,
      externals,
      bundle.babel,
      filename,
      packageName,
      bundleType,
      bundle.global,
      bundle.moduleType,
      bundle.modulesToStub,
      pureExternalModules
    ),
    
    legacy:
      bundleType === FB_WWW_DEV ||
      bundleType === FB_WWW_PROD ||
      bundleType === FB_WWW_PROFILING,
  };
  const [mainOutputPath, ...otherOutputPaths] = Packaging.getBundleOutputPaths(
    bundleType,
    filename,