Commits
Neal Richardson authored 2cbb5348218
ARROW-10803: Support R >= 3.3 and add CI Includes fixes for compiling on R 3.4 and R 3.3, plus a crossbow job to build on old R versions Closes #8833 from nealrichardson/old-r-versions Lead-authored-by: Neal Richardson <neal.p.richardson@gmail.com> Co-authored-by: Romain Francois <romain@rstudio.com> Signed-off-by: Neal Richardson <neal.p.richardson@gmail.com>