Nightly builds of R-devel?

Hi Simon


I wonder if it's possible to provide more up-to-date builds of R-devel 
for macOS, via https://mac.r-project.org/ . I'd like to be able to "just 
install" the latest and greatest R version. As of today, the most recent 
is from the end of October, and it looks like three of my packages only 
break with an R-devel version more recent than that. Thanks!

Downstream issue: https://github.com/r-lib/rig/issues/204 .


Best regards

Kirill