Document json option

[TheAlexLichter]

The json option from #415 has to be documented, ideally with a structured data example.

[ducan-ne]

is that we need make document for #415?

[TheAlexLichter]

@Quaj yes!

[marcelxpfeifer]

This has been resolved?

[pimlie]

Nope, not yet :)

[marcelxpfeifer]

Didn't you put it in with #416

[pimlie]

Ah yes, but the prop is not yet listed under Special metainfo properties: https://vue-meta.nuxtjs.org/api/#special-metainfo-attributes

[marcelxpfeifer]

Alright working on it