`PositionEncodingKind` hook

[tombh]

Does this cattrs hook need to be added?

converter.register_structure_hook(
    Union[PositionEncodingKind, str, None], lambda obj, _: obj
)

I'm adding support for LSP 3.17's position encoding negotiation in Pygls and I was getting errors during server initialisation. The PR is here openlawlibrary/pygls#375

It's the first time I've come across this area of the codebase, so I'm not completely clear about what the best solution is.

[karthiknadig]

Yes, this likely needs a hook. It should go in this file:
https://github.com/microsoft/lsprotocol/blob/main/packages/python/lsprotocol/_hooks.py

Example hook here:
Hook def: https://github.com/microsoft/lsprotocol/blob/main/packages/python/lsprotocol/_hooks.py#L194-L201
Add it here: https://github.com/microsoft/lsprotocol/blob/main/packages/python/lsprotocol/_hooks.py#L703-L706

I will add this tomorrow.

[karthiknadig]

I have added a new test suite that should catch all these issues.
#273

it adds significantly more coverage: