Avoid native pipe check note or build warning on R >= 4.5.0

[nanxstats]

This PR fixes the R CMD check note or R CMD build warning on r-devel (upcoming R 4.5.0) where |> is used in functions under R/, by replacing the native pipe with the magrittr pipe.

This check note is currently shown on all r-devel CRAN builds:

Version: 1.1.3
Check: DESCRIPTION meta-information
Result: NOTE
    Missing dependency on R >= 4.1.0 because package code uses the pipe
    |> or function shorthand \(...) syntax added in R 4.1.0.
    File(s) using such syntax:
      ‘expected_time.R’ ‘gs_info_ahr.R’
Flavors: r-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc,
         r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc,
         r-devel-macos-x86_64, r-devel-windows-x86_64

Without this fix, for new source tarballs built by R 4.5.0, this becomes a build warning, since R CMD build will auto-bump the R >= 3.5.0 requirement in DESCRIPTION in the tarball.

[jdblischak]

Makes sense. We're already importing %>% from {dplyr}, so we may as well use it so that we don't have to bump the minimum required R version. Thanks @nanxstats!

gsDesign2/NAMESPACE

Line 67 in fc3e9a6

importFrom(dplyr,"%>%")

gsDesign2/DESCRIPTION

Line 37 in fc3e9a6

R (>= 3.5.0)

[LittleBeannie]

Thanks, @nanxstats