Indeed, the update of AUCell will take a couple of days to be available in Bioconductor.
I should have waited to publish the new version of SCENIC until AUCell/RcisTarget were available in Bioc to avoid confusion (sorry!), but some users wanted to start using it ASAP. If you also prefer not to wait, you can install the Github devel version meanwhile (https://github.com/aertslab/AUCell, you can install it with devtools::install_github).
Thanks very much!