Extractor: Handle object props as namespace

[LudvigHz]

I forgot to handle object properties in #204 😓

This will handle those cases as well, which I found quite a few uses of in our own code at least,
where you define a const object of namespaces.

Hopefully this isn't too niche, but I do think that the more common patterns the extractor can cover
the better the cli is :)

Checklist

• only relevant code is changed (make a diff before you submit the PR)
• run tests npm run test
• tests are included
• commit message and code follows the Developer's Certification of Origin

[adrai]

v1.47.12 👍