Fixed broken Julia LSP support + fixed broken MarkDown LSP support

[alberti42]

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References

• It fixes MarkDown support that was broken. It replaces the broken unified-language-server with vscode_markdown_languageserver. See issues raised at https://discourse.jupyter.org/t/how-to-install-and-run-markdown-language-server/24286/3
• It fixes support for Julia LSP. There were several mistakes in how to LSP server was called; see notes in the commits.

Code changes

Changes are documented in the commits.

User-facing changes

No visual changes in the settings.

Backwards-incompatible changes

No changes to API.

Chores

• [ ] linted
• [ ] tested
• [ ] documented
• [ ] changelog entry

I am glad to contribute to all chores if the PR will be considered and the bugs eventually fixed upstream. Before investing more time, I prefer to wait for some reactions from the maintainers. Thanks for your understanding.

Changes are anyhow very limited and small in their extent.

[github-actions[bot]]

:point_left: Launch a binder notebook on branch alberti42/jupyterlab-lsp/main

[krassowski]

Thank you for the PR, sorry I missed it back in October!