Bump scala and deps, move to sbt

[kubukoz]

No description provided.

[kubukoz]

Builds for me locally + I was seemingly able to publish in https://github.com/polyvariant/jsonrpclib/actions/runs/14322238929/job/40141253774.

edit: well, except for the cursed core module...

[kubukoz]

alright, got a green build: https://github.com/polyvariant/jsonrpclib/actions/runs/14339869694/job/40196214810

think we're good to go

[kubukoz]

it's jsoniter again, and "too many redirects" which I suppose might be due to lack of access to secrets?

    PGP_PASSPHRASE: 
    PGP_SECRET: 
    SONATYPE_PASSWORD: 
    SONATYPE_USERNAME: 

all empty. Makes sense because this is a PR from a fork.

The jsoniter issue might be due to a hidden clean in sbt-ci-release, I'll check that kater.

[Baccata]

YOLO