libcurl: libcurl-devel (rpm) or
libcurl4-openssl-dev (deb).

https://jeroen.cran.dev/curl (docs)
https://github.com/jeroen/curl#readme (devel)
https://curl.haxx.se/libcurl/ (upstream)

spelling, testthat (>= 1.0.0), knitr, jsonlite, rmarkdown,
magrittr, httpuv (>= 1.4.4), webutils

Jeroen Ooms [aut, cre] (<https://orcid.org/0000-0002-4035-0289>),
  Hadley Wickham [ctb],
  RStudio [cph]

R (>= 3.1.2), methods, grid, graphics, stats, grDevices

circlize (>= 0.4.5), GetoptLong, colorspace, clue,
RColorBrewer, GlobalOptions (>= 0.1.0), parallel, png, digest,
S4Vectors, IRanges

testthat (>= 1.0.0), knitr, markdown, dendsort, Cairo, jpeg,
tiff, fastcluster, dendextend (>= 1.0.1), grImport, grImport2,
glue, GenomicRanges, gridtext, pheatmap (>= 1.0.12), shiny

Complex heatmaps are efficient to visualize associations 
    between different sources of data sets and reveal potential patterns. 
    Here the ComplexHeatmap package provides a highly flexible way to arrange 
    multiple heatmaps and supports various annotation graphics.

Methods to Convert R Data to YAML and Back

Jeremy Stephens [aut, cre], Kirill Simonov [aut], Yihui Xie [ctb],
  Zhuoer Dong [ctb], Hadley Wickham [ctb], Jeffrey Horner [ctb], reikoch [ctb],
  Will Beasley [ctb], Brendan O'Connor [ctb], Gregory R. Warnes [ctb]

Implements the 'libyaml' 'YAML' 1.1 parser and emitter
  (<http://pyyaml.org/wiki/LibYAML>) for R.

c(person("Baptiste", "Auguie",
    email = "baptiste.auguie@gmail.com",
    role = c("aut", "cre")), person("Anton", "Antonov",
    email = "tonytonov@gmail.com",
    role = c("ctb")))

Miscellaneous Functions for "Grid" Graphics

Provides a number of user-level functions to work with "grid"
    graphics, notably to arrange multiple grid-based plots on a page, and draw
    tables.

gtable, grid, grDevices, graphics, utils

Baptiste Auguie [aut, cre],
  Anton Antonov [ctb]

Provides a wrapper for the download.file function,
    making it possible to download files over HTTPS on Windows, Mac OS X, and
    other Unix-like platforms. The 'RCurl' package provides this functionality
    (and much more) but can be difficult to install because it must be compiled
    with external dependencies. This package has no external dependencies, so
    it is much easier to install.