Another improvement to TS type checking

[forabi]

export const LoadableNotablePerson = universal(import('./NotablePerson'), {
  key: 'NotablePerson',
});

If key is a string, it must be a key of the export module object. This helps avoid typos.

[faceyspacey]

Do you mind doing these commits with the script, npm run cm. Then it auto publishes to npm once merged :)

[forabi]

Ah, sorry, I was using GitHub's UI to make the changes. I force-pushed the new commit to this PR.