rlang, jsonlite, dplyr, purrr, tidyr, stringr, lubridate,
magrittr, xml2, rvest, curl
rlang, jsonlite, dplyr, purrr, tidyr, stringr, lubridate,
magrittr, xml2, rvest, curl, httr
knitr, rmarkdown, ggplot2, testthat (>= 3.0.0), covr, chess