JSON Schema Draft 8 implementation

Hi!
There is new JSON Schema draft available here: http://json-schema.org/specification-links.html#2019-09-formerly-known-as-draft-8
Does this library needs changes?
Actually, I don't read this draft yet. May be someone tell: does this library already implements new draft or it needs some changes?

I suggest you create roadmap for the changes, if necessary.
It could help the community to focus what's really needed and track the overall progress.