Comment # 12 on bug 993268 from Wolfgang Bauer

I think this can rather be considered fixed, as an update for rkward has been
released back then...

The rkward package also has a %require_eq on R-base since
https://build.opensuse.org/request/show/418876, which should force it being
rebuilt or every R-base update.

Although, I noticed that this was ineffective because R-base was spelt wrong
(R-*B*ase), but I fixed this in the latest update.