digest, glue, grDevices, grid, gtable (>= 0.1.1), isoband,
MASS, mgcv, rlang (>= 0.3.0), scales (>= 0.5.0), stats, tibble,
withr (>= 2.0.0)

covr, dplyr, ggplot2movies, hexbin, Hmisc, knitr, lattice,
mapproj, maps, maptools, multcomp, munsell, nlme, profvis,
quantreg, RColorBrewer, rgeos, rmarkdown, rpart, sf (>= 0.7-3),
svglite (>= 1.2.0.9001), testthat (>= 2.1.0), vdiffr (>= 0.3.0)

Hadley Wickham [aut] (<https://orcid.org/0000-0003-4757-117X>),
  Winston Chang [aut] (<https://orcid.org/0000-0002-1576-2126>),
  Lionel Henry [aut],
  Thomas Lin Pedersen [aut, cre]
    (<https://orcid.org/0000-0002-5147-4711>),
  Kohske Takahashi [aut],
  Claus Wilke [aut] (<https://orcid.org/0000-0002-7470-9261>),
  Kara Woo [aut] (<https://orcid.org/0000-0002-5125-4188>),
  Hiroaki Yutani [aut] (<https://orcid.org/0000-0002-3385-7233>),
  Dewey Dunnington [aut] (<https://orcid.org/0000-0002-9415-4582>),
  RStudio [cph, fnd]

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.

Fast, correct, consistent, portable and convenient character
    string/text processing in every locale and any native encoding. 
    Owing to the use of the 'ICU' (International Components for Unicode) 
    library, the package provides 'R' users with platform-independent functions
    known to 'Java', 'Perl', 'Python', 'PHP' and 'Ruby' programmers. Available
    features include: pattern searching (e.g., with 'Java'-like regular
    expressions or the 'Unicode' collation algorithm), random string generation,
    case mapping, string transliteration, concatenation,
    Unicode normalization, date-time formatting and parsing and many more.

Marek Gagolewski [aut, cre] (<https://orcid.org/0000-0003-0637-6028>),
    Bartek Tartanus [ctb]
    and other contributors (stringi source code);
    IBM, Unicode, Inc. and other contributors (ICU4C source code);
    Unicode, Inc. (Unicode Character Database)