This is a resubmission. In this version we have:
Updated the package to version 0.8.5 and fixed minor bugs and typos to adjust the package code to R 4.0 devel (see NEWS.md).
- local ubuntu 18.04 R 3.6.0
- win-builder (release)
- travis Ubuntu 12.04.5 LTS
- rhub
There were no ERRORs or WARNINGs.
- Some examples use multiple cores but not more than 2.