Correct quarter's domain to produce correct month
Correct quarter's domain to produce correct month

The domain should be [0,1,2,3] instead of [0,3,6,9] since the output dateTimeExpr multiplies the quarter value by 3

Fix #1531, Fix #1532

I haven't inspected each individual values in the plot as we don't have tooltip in the editor yet, but the output seems correct to me.  (cc: @zeningqu)

Thanks @willium for hinting

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