`vello_encoding` is not re-exported from `vello`

I'm just starting to play around with vello, and I noticed that it diligently re-exports `peniko` and `kurbo`, but not `vello_encoding`.   
For example, `Scene::encoding()` is still usable, but its return type can't be spelled out without depending on `vello_encoding` as well.  
Sorry if this is intended behavior, but it struck me as odd.