List all R versions supported by Posit Package Manager (PPM)
Value
Data frame with columns:
r_version: minor R versions, i.e. version numbers containing the first two components of R versions supported by this PPM instance.
See also
The 'pkgcache and Posit Package Manager on Linux' article at https://r-lib.github.io/pkgcache/dev/.
Other PPM functions:
ppm_has_binaries(),
ppm_platforms(),
ppm_repo_url(),
ppm_snapshots()