geom_rootedge aesthetics

[JorgensenD]

Hi,
more of a request than an issue.
Would it be possible to add the ability to colour the root edge? Currently it plots in black by default and throws an unused argument error when you try to add geom_rootedge(colour="red") for example.
I would like it to match the rest of my tree which is coloured.
Best wishes,
David

[GuangchuangYu]

supported.