httr, jsonlite, dplyr, tibble, lubridate, tidyr
httr, jsonlite, dplyr, tibble, lubridate, tidyr, stringi
jsonlite, dplyr, tibble, lubridate, tidyr
jsonlite, dplyr, tibble, lubridate, tidyr, snakecase
knitr, rmarkdown, testthat, covr, methods
knitr, rmarkdown, testthat, covr, methods, mnis