## Test environments
* Debian Linux, GCC, R-devel/R-patched/R-release
* Fedora Linux, GCC/clang, R-devel
* Ubuntu Linux 16.04 LTS, R-release, GCC
* win-builder (R-devel and R-release)
* macOS 10.14, R-oldrel

## R CMD check results

There were no ERRORs or WARNINGs. On some platforms, there is a NOTE about the installed package size.