Bulk: all for density-basic #14

Job	Run time
build-matrix	4s
preview	2s
generate (density-basic, seaborn)	5s
generate (density-basic, bokeh)	3s
generate (density-basic, pygal)	5s
generate (density-basic, plotnine)	4s
generate (density-basic, altair)	3s
generate (density-basic, matplotlib)	3s
generate (density-basic, letsplot)	5s
generate (density-basic, highcharts)	5s
generate (density-basic, plotly)	4s
summary	4s
	47s

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