Add pylance-version option

[debonte]

Part of microsoft/pylance-release#4927

Added a new pylance-version option which can be latest-release, latest-prerelease, or a specific Pylance version number like 2023.11.11.

When pylance-version is provided and version is not, we'll leverage the Pylance release metadata JSON files in https://github.com/microsoft/pylance-release/tree/main/releases to determine which version of Pyright is included in that Pylance release, and then download and run that Pyright build as usual.

[jakebailey]

Overall this seems good; you will need to also update the README as well to document the option, and maybe add an example.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e4696e5) 100.00% compared to head (e10e928) 100.00%.
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##              main       #63    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files            3         3            
  Lines          191       457   +266     
  Branches        45        98    +53     
==========================================
+ Hits           191       457   +266     

Files	Coverage Δ
src/helpers.ts	100.00% <100.00%> (ø)
src/schema.ts	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[jakebailey]

This seems good to me; thanks for sending this. Any other remaining concerns? If not, I'll cut a release for this.

[debonte]

Any other remaining concerns?

I should be sending a matching PR to pyright-python today. In the off-chance that Robert has any feedback that somehow impacts this change, would you mind holding off on merging this until he approves my PR?

[jakebailey]

I'm now out at a morale event so can't do it now anyway; just let me know when you're ready and I'll merge and release it!

[debonte]

FYI, I'm still waiting for feedback on my pyright-python PR. I'm guessing Robert is on vacation. He was quite responsive a couple weeks ago, but has been silent over the past week. I'll let you know if this can be merged as soon as I hear back from him on RobertCraigie/pyright-python#230.

[debonte]

@jakebailey, the pyright-python PR was merged without any changes that would impact this PR. So please merge this at your convenience. Thanks!

[jakebailey]

Released in v1.8.0. Thanks!