Build on GitHub Actions

[Jim Hester]

Enable GitHub Actions for this project. You will need to install the development version of usethis (remotes::install_dev("usethis"). For more details see GitHub Actions for R.

• run usethis::use_github_actions_tidy()
  • Add badges in your clipboard to README.md
    • If README.Rmd exists add badges to that instead and run devtools::build_readme().
• look at existing .travis.yml and see if there is extra logic that needs to be included.
  • If .travis.yml builds a pkgdown site
    • run usethis::use_github_action("pkgdown.yaml")
    • ping @jimhester to add DEPLOY_PAT to the repository secrets.
• look at existing appveyor.yml and see if there is extra logic from .travis.yml and appveyor.yml that needs to be included.
• modify R-CMD-check.yaml with extra logic if needed.
• ping @jimhester to add codecov.io token CODECOV_TOKEN to the repository secrets.