[Build] Vega uses draft 6 now (#4799)
[Build] Vega uses draft 6 now (#4799)


vega/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite