Specify that Rstudio 1.1+ is required

[ghost]

The pre-work recommended getting the latest versions of R (3.5+) and RStudio (with no minimum version mentioned). It seems that having the Terminal (available in 1.1+) is critical; can it be made clear that is the oldest viable version for this workshop?

I get that ideally we'd all be working with the latest versions, but for those of us stuck behind layers of IT bureaucracy it's not always so simple.