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!
return Wrappers.wrapBundle(
          source,
          bundleType,
          globalName,
          filename,
          moduleType
        );
      },
    },
    
    sizes({
      getSize: (size, gzip) => {
        const currentSizes = Stats.currentBuildResults.bundleSizes;
        const recordIndex = currentSizes.findIndex(
          record =>
            record.filename === filename && record.bundleType === bundleType
        );
        const index = recordIndex !== -1 ? recordIndex : currentSizes.length;
        currentSizes[index] = {
          filename,
          bundleType,
          packageName,
          size,
          gzip,
        };
      },
    }),
  ].filter(Boolean);
}
function shouldSkipBundle(bundle, bundleType) {