Log Message:
(devel/R-devtools) Updated 2.4.2 to 2.4.3

# devtools 2.4.3

* New `Check_mac_release()` function to check a package using the
  macOS builder at https://mac.r-project.org/macbuilder/submit.html

* (#2375) Jenny Bryan is now the official maintainer.

* `release()` and `submit_cran()` now record submission details using
  the Debian Control File format, for better machine-readability. This
  file has a new name, CRAN-SUBMISSION (instead of CRAN-RELEASE) and
  now includes package version, in addition to the full SHA and a
  timestamp.