Add type inference from styled componens about atomic-layout

[kettanaito]

This does not appear to be possible in TypeScript. Tried:

type InferProps<O> = O extends
  | StyledComponent<any, any, infer P>
  | StyledComponentBase<any, any, infer BP>
  ? P | BP
  : { fallback: boolean }

And a bunch of other methods, but it's impossible to refer to a value type alongside its declaration (throws typescript error).

There's been a suggestion from Nick to provide an explicit casting:

const BoxAsMyFoo = Object.assign({}, Box, { defaultProps: { as: MyFoo } })

But I wasn't successful in this either. If you know the proper way to achieve such typings inference please reopen the issue. Thanks.