Upkeep for fs (2025)

### To begin * [x] `usethis::pr_init("upkeep-2025-04")` ### 2025 * [x] `usethis::use_air()` <https://posit-dev.github.io/air/> * [x] `usethis::use_package("R", "Depends", "4.1")` * [x] Switch to the base pipe (`|>`) * [x] Switch to the base anonymous function syntax (`\(x)`) * [x] Add ROR for Posit in `DESCRIPTION`: `person("Posit Software, PBC", role = c("cph", "fnd"), comment = c(ROR = "03wc8by49"))` * [x] `knitr::convert_chunk_header(type = "yaml")` to convert in-header chunk options to the newer in-body style used by Quarto * [x] Switch to `expect_snapshot(error = TRUE)` instead of calling `expect_error()` without specifying `class =` ### To finish * [x] `usethis::use_mit_license()` * [x] `usethis::use_tidy_description()` * [x] `usethis::use_tidy_github_actions()` * [x] `devtools::build_readme()` * [x] Add alt-text to pictures, plots, etc; see https://posit.co/blog/knitr-fig-alt/ for examples * [x] ~~[Re-publish released site](https://pkgdown.r-lib.org/dev/articles/how-to-update-released-site.html) if needed~~ ^{Created on 2025-04-23 with `usethis::use_tidy_upkeep_issue()`, using [usethis v3.1.0.9000](https://usethis.r-lib.org)}