[R-pkg-team] Bug#1103118: r-cran-timechange: should depend on R>=4.5

[Rebecca N. Palmer]

Control: reopen -1
Control: retitle -1 r-cran-timechange: should depend on R>=4.5
Control: reassign -1 r-cran-timechange
Control: affects -1 r-cran-caret r-cran-dbitest r-cran-epir
Control: affects -1 + r-cran-lubridate r-cran-recipes
Control: affects -1 + r-cran-themis r-cran-tidyverse

This isn't a 32-bit problem as such - it's another package that picked 
up the R_getVar symbol (new in R 4.5) when it was binNMUd on some 
architectures.

(The other known one is r-cran-svglite #1103369.  Like that one, the 
best we can do after the fact is to add an explicit R>=4.5 dependency, 
which I am now doing.)