utils, stats, tools, rmarkdown (>= 1.10), htmltools, jsonlite
(>= 1.3), lubridate, png, mime, rstudioapi, rprojroot, xml2,
base64enc, whisker, downloader, progress, stringr, knitr (>=
1.15.6), digest, yaml
utils, stats, tools, rmarkdown (>= 1.10), bookdown (>= 0.8),
xfun (>= 0.2), htmltools, jsonlite (>= 1.3), lubridate, png,
mime, rstudioapi, rprojroot, xml2, base64enc, whisker,
downloader, progress, stringr, knitr (>= 1.15.6), digest, yaml
htmlwidgets, r2d3, DiagrammeR, shiny, rsconnect, testthat