Display of maps.  Projection code and larger maps are in
             separate packages ('mapproj' and 'mapdata').

mapproj (>= 1.2-0), mapdata (>= 2.3.0), sp, maptools,
rnaturalearth

c(
    person("Ramnath", "Vaidyanathan", role = c("aut", "cph")),
    person("Yihui", "Xie", role = c("aut")),
    person("JJ", "Allaire", role = c("aut")),
    person("Joe", "Cheng", role = c("aut", "cre"), email = "joe@rstudio.com"),
    person("Kenton", "Russell", role = c("aut", "cph")),
    person(family = "RStudio", role = "cph")
    )

A framework for creating HTML widgets that render in various
    contexts including the R console, 'R Markdown' documents, and 'Shiny'
    web applications.

grDevices, htmltools (>= 0.3), jsonlite (>= 0.9.16), yaml

Ramnath Vaidyanathan [aut, cph],
  Yihui Xie [aut],
  JJ Allaire [aut],
  Joe Cheng [aut, cre],
  Kenton Russell [aut, cph],
  RStudio [cph]

Functions for Base Types and Core R and 'Tidyverse' Features

A toolbox for working with base types, core R features
  like the condition system, and core 'Tidyverse' features like tidy
  evaluation.

covr, crayon, magrittr, methods, pillar, rmarkdown, testthat
(>= 2.0.0)

Access the RStudio API (if available) and provide informative error
    messages when it's not.

c(
    person("Kevin", "Ushey", role = c("aut", "cre"), email = "kevin@rstudio.com"),
    person("JJ", "Allaire", role = c("aut"), email = "jj@rstudio.com"),
    person("Hadley", "Wickham", role = c("aut"), email = "hadley@rstudio.com"),
    person("Gary", "Ritchie", role = c("aut"), email = "gary@rstudio.com"),
    person(family = "RStudio", role = "cph")
    )

Kevin Ushey [aut, cre],
  JJ Allaire [aut],
  Hadley Wickham [aut],
  Gary Ritchie [aut],
  RStudio [cph]

Makes it incredibly easy to build interactive web
    applications with R. Automatic "reactive" binding between inputs and
    outputs and extensive prebuilt widgets make it possible to build
    beautiful, responsive, and powerful applications with minimal effort.

utils, grDevices, httpuv (>= 1.5.0), mime (>= 0.3), jsonlite
(>= 0.9.16), xtable, digest, htmltools (>= 0.3.6), R6 (>= 2.0),
sourcetools, later (>= 0.7.2), promises (>= 1.0.1), tools,
crayon, rlang