Bulk: all for choropleth-basic #171

Job	Run time
build-matrix	9s
preview	2s
generate (choropleth-basic, plotnine)	7s
generate (choropleth-basic, plotly)	6s
generate (choropleth-basic, seaborn)	5s
generate (choropleth-basic, altair)	7s
generate (choropleth-basic, pygal)	8s
generate (choropleth-basic, bokeh)	7s
generate (choropleth-basic, matplotlib)	6s
generate (choropleth-basic, letsplot)	8s
generate (choropleth-basic, highcharts)	5s
summary	2s
	1m 12s

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