KDL 2.0 compliance

[zkat]

KDL 2.0.0-draft.3 is now generally available (kdl-org/kdl#286), and with it, we've decided to encourage existing implementations to start working towards 2.0 support and send feedback and suggestions for anything you might run into, so I'm making this tracking issue. :)

[zkat]

KDL 2.0.0 has been released (https://github.com/kdl-org/kdl/releases/tag/2.0.0)

[amaanq]

Nice, I'll look into updating this grammar soon w/ those changes. I'd probably keep the grammar backwards-compatible for v1

[zkat]

Heya! Is there anything I can do to help out with this? I can also help put out a call to the community in case someone wants to take it on.

[uncenter]

I'm interested in KDL right now and I have some experience with Tree-sitter grammars. If @amaanq doesn't have time to work on it right now I'd be happy to give updating it a go!