Histogram series. See Bland.histogram/3 and Bland.Histogram.
Unlike Bar, histograms render on a numeric x-axis: bars sit
flush against each other at their bin boundaries, with no category
slots and no per-bar padding.
Fields:
:bin_edges— strictly increasing list, lengthn + 1:values— lengthn; interpretation depends on:normalize:normalize—:count | :pmf | :density | :cmf:density— backwards-compat boolean;trueiff:normalizeis:density