output infos for inspect and validate as json

[arpu]

hi,

at the moment there is --format md pretty csv, would it be possible to add json with the cli?

[donmccurdy]

Hi! Previously requested in #231, with some details there about implementation. I'm open to this as a feature request, and PRs would be welcome, though it isn't something I'm planning to implement myself right now.

[arpu]

Thanks for the info!