fix: use resolve "shared" instead of steps to fix artifacts in grouped density transform

[jonmmease]

Closes #9078

[domoritz]

Should this one change?

[jonmmease]

Yeah, the input Vega-Lite spec has:

    {
      "density": "value",
      "bandwidth": 10,
      "groupby": ["Measurement"],
      "extent": [10, 500],
      "counts": true,
      "steps": 200
    }

Since groupby is defined we get "resolve": "shared". "steps": 200 is still there because it's explicitly specified in the Vega-Lite transform.

[joelostblom]

I'm teaching a class starting middle of next week which would benefit from having this included. Is there any chance for a patch release of VL that includes this fix before then? It is not critical as I can work around it by teaching resolve_scale manually or use and older version of Altair, but just wanted to check-in, in case anyone has the bandwidth.

[domoritz]

Yes. I think either @kanitw and @lsh make a release after #9111 before the weekend or I will make a release with this fix.

[joelostblom]

Awesome, thank you!!

[domoritz]

https://github.com/vega/vega-lite/releases/tag/v5.15.1

[joelostblom]

That's great, thank you so much!

[joelostblom]

Is there a build process that takes some time before the URL https://vega.github.io/schema/vega-lite/v5.15.1.json goes live? Or is there a separate manual step for that?

[domoritz]

There is a build process but I got a failure email. @kanitw can you check?

[domoritz]

Reran it and worked now.