Potential for Async Factory

[pmalacho-mit]

For code splitting and dynamic import(...)s reasons, it'd be awesome to be able to have an async factory function. I just tried it out, and as one might expect I got the error:

Error: Objects are not valid as a React child (found: [object Promise]). If you meant to render a collection of children, use an array instead.

[pmalacho-mit]

(and forgot to say an obligatory I love this package! thanks so much for creating it)