methods, stats, utils, httr (>= 1.0.0), jsonlite
methods, stats, utils, httr (>= 1.1.0), jsonlite
roxygen2 (>= 5.0.1), testthat, knitr, rmarkdown
testthat, knitr, rcrossref, handlr, httpuv
testthat, knitr, rcrossref, handlr, httpuv, vcr, covr