Support ruby 3.4

[artemave]

console1984 is using parser gem to parse user input ruby code into ast, but that gem does not support (and not planning to) ruby 3.4 onward, due to the new bulit-in ruby parser (prism).

I guess that means that console1984 should be using prism parser on ruby 3.4 onward.

[jorgemanrubia]

Thanks @artemave. Agree that this will be a change we'll have to do. If anyone want to explore a PR I'll be happy to review.