Update for specification version 3.17

[vinistock]

Hello!

I've tried using generateFiles to update the gem to the latest version of the specification, since it's missing some new features (like inlay hints, pull diagnostics, etc).

However, it looks like the specification was broken down into multiple markdown files using relative references. You can see this by searching for include_relative in the raw specification markdown file.

This makes the generateFiles script miss a lot of the interfaces since they are now defined in separate files.

Any suggestions/ideas on how to handle this?

The steps I took to run generateFiles were

• Updated the LSP version to 3.17 and the commit SHA to the most recent one
• Changed the fetch URL to https://github.com/Microsoft/language-server-protocol/raw/${lspRepoRevision}/_specifications/lsp/${lspVersion}/specification.md, which matches the current repo structure

[mtsmfm]

Close via #37

I've just released 3.17.0.0. https://rubygems.org/gems/language_server-protocol/versions/3.17.0.0

[vinistock]

Thank you very much!