Bulk: all for chessboard-pieces #196

Job	Run time
build-matrix	6s
preview	2s
generate (chessboard-pieces, seaborn)	7s
generate (chessboard-pieces, plotnine)	7s
generate (chessboard-pieces, bokeh)	16s
generate (chessboard-pieces, plotly)	7s
generate (chessboard-pieces, letsplot)	11s
generate (chessboard-pieces, matplotlib)	8s
generate (chessboard-pieces, pygal)	6s
generate (chessboard-pieces, highcharts)	9s
generate (chessboard-pieces, altair)	6s
summary	4s
	1m 29s

Provide feedback