Change the height of whiskers in barchart

[John-Toohey]

These whiskers on this barchart are too tall and thus overlap! How should I slim them down?

    #cetz.canvas({
      let data1 = (
        ([With Instruction], 11.15, 6.15),
        ([Without Instruction], 3.80, 5.20),
      )
      chart.barchart(
        size: (10, 2),
        label-key: 0,
        value-key: 1,
        error-key: 2,
        x-label: [Mean Instances of Sexist Language Identified],
        bar-style: (cetz.palette.new(colors: (luma(50%),))),
        data1,
        min: 0,
      )
    })

[johannes-wolf]

You cannot set them using the chart API, which is a bug.
A workaround would be using the plot API and call plot.add-bar(...) + plot.add-errorbar(..., whisker-size: <size>), as in scr/chart/barchart.typ.