Resubmission

This is a resubmission. In this version I have:

Modified the DESCRIPTION file as requested by CRAN;
Replaced dontrun{} by donttest{} in the examples of the use_distops() and use_distance() functions.

Test environments

local macOS R installation, R 4.3.2
continuous integration via GH actions:
- macOS latest release
- windows latest release
- ubuntu 20.04 latest release and devel
win-builder (release, devel and old-release)
macbuilder
R-hub
- Windows Server 2022, R-devel, 64 bit
- Ubuntu Linux 20.04.1 LTS, R-release, GCC
- Fedora Linux, R-devel, clang, gfortran
- Debian Linux, R-devel, GCC ASAN/UBSAN

0 errors | 0 warnings | 2 notes

* This is a new release.
* checking for GNU extensions in Makefiles ... NOTE
  GNU make is a SystemRequirements.