crul (>= 0.4.0), jsonlite (>= 1.5), pdftools (>= 1.3), hoardr
roxygen2 (>= 6.0.1), testthat, knitr, rmarkdown, rcrossref
roxygen2 (>= 6.1.0), testthat, knitr, rmarkdown, rcrossref
roxygen2 (>= 7.1.0), testthat, knitr, rmarkdown, rcrossref,
vcr