Bump jls, prepare release, simplify README

Update jls version, new release

Update readme

Diagnostics disabled by default

Make nullable configuration options explicitly nullable

Support Python 3.11

- Upgrade to jls 0.38.0
- Add jedi.workspace.environmentPath

Bump version, bump jls version, yarn upgrade

Bump version to 0.31.1

Bump jls to 0.36.0, drops support for Python 3.6

Bump version, update changelog