I’ve uploaded an R package to CRAN and also have a corresponding GitHub repo for it. I plan to make quite a lot of changes to the package going forward but I want to test them in my R console first – how can I do this? Specifically, I’d like to be able to load the CRAN version and a development version in R together to compare. So for example library(package) and library(packageDev), but without the latter being publicly available.