Pin package/s

Hi! 

I don?t know if you know package manager for macOS Homebrew. With Homebrew there is a way to stop update certain packages: 

brew pin <formula/package>

Does anyone know a way to do a similar thing with R packages? 

In the same way, it would be great to be able to receive a notification ?an email? when a new version of a package reach CRAN or any other repository. 

I would like to have something like this because the Data Table package has a certain makevars necessities when it?s built in a Homebrew R install. It isn?t really problematic since it the package hasn?t built correctly when you load it on R it will display a message. However, I?m thinking that perhaps something like this could be useful also for other packages. 

Thanks!