Request for rendering barrier=bus_trap

### Expected behavior
I request to render barrier=bus_trap with the icon that is proposed by User:Chrisana13

### Actual behavior
At this moment barrier=bus_trap is not rendered

### Links and screenshots illustrating the problem
https://www.openstreetmap.org/node/321618556
https://wiki.openstreetmap.org/wiki/User:Chrisana13