colorspace, glue, methods, purrr, utils, whisker
callr, ggplot2, knitr, rmarkdown, scales, showtext, sysfonts,
testthat (>= 2.1.0), xaringan
callr, ggplot2, knitr, mockery, rmarkdown, scales, showtext,
sysfonts, testthat (>= 2.1.0), xaringan