Upkeep for RGCCA

[GFabien]

Pre-history

• [ ] usethis::use_readme_rmd()
• [ ] usethis::use_roxygen_md()
• [ ] usethis::use_github_links()
• [ ] usethis::use_pkgdown_github_pages()
• [ ] usethis::use_tidy_labels()
• [ ] usethis::use_tidy_style()
• [ ] usethis::use_tidy_description()
• [ ] urlchecker::url_check()

2020

• [ ] usethis::use_package_doc() Consider letting usethis manage your @importFrom directives here. usethis::use_import_from() is handy for this.
• [ ] usethis::use_testthat(3) and upgrade to 3e, testthat 3e vignette
• [ ] Align the names of R/ files and test/ files for workflow happiness. usethis::rename_files() can be helpful.

2021

• [ ] usethis::use_tidy_dependencies()
• [ ] usethis::use_tidy_github_actions() and update artisanal actions to use setup-r-dependencies
• [ ] Remove check environments section from cran-comments.md
• [ ] Bump required R version in DESCRIPTION to 3.4
• [ ] Use lifecycle instead of artisanal deprecation messages, as described in Communicate lifecycle changes in your functions