Provides a parallel backend for the %dopar% function using the parallel package.
copied from cf-staging / r-doparallelconda install conda-forge::r-doparallel
conda install conda-forge/label/cf201901::r-doparallel
conda install conda-forge/label/cf202003::r-doparallel
conda install conda-forge/label/gcc7::r-doparallel