Added missing marker-comp-op support (works for markers with allow-overlap=false)
@@ -562,6 +562,7 @@ namespace carto { namespace css {
{ "marker-allow-overlap", "allow-overlap" },
{ "marker-ignore-placement", "ignore-placement" },
{ "marker-transform", "transform" },
+ { "marker-comp-op", "comp-op" },
{ "building-fill", "fill" },
{ "building-fill-opacity", "fill-opacity" },
