continuous integration on other platforms and other versions of R

[myoung3]

https://devguide.ropensci.org/ci.html

[myoung3]

switch from travis to github actions?
https://github.com/r-lib/actions/
https://github.com/r-lib/actions/tree/master/examples

[myoung3]

"Note that the tidyverse team now uses GitHub Actions for continuous integration, so the usethis functions supporting GitHub Actions are now the most actively maintained. See use_github_actions() or use_tidy_github_actions() to learn more."
--https://usethis.r-lib.org/reference/ci.html

https://usethis.r-lib.org/reference/tidyverse.html