Toby Dylan Hocking, Susan VanderPlas, Carson Sievert, Kevin Ferris, Tony
    Tsai, Faizan Khan
An interactive animation can be defined using a list of
    ggplots with clickSelects and showSelected aesthetics.
RJSONIO (>= 1.3),
grid,
plyr,
hexbin,
scales
knitr (>= 1.5.33),
servr,
gistr (>= 0.2),
shiny,
htmltools,
rmarkdown,
digest,
testthat,
RSelenium,
XML,
devtools,
httr,
maps