in description file should be
Depends: R (>= 3.5.2), ggplot2 (>= 3.3.0), purrr (>= 0.3.3) Imports: dplyr (>= 0.8.5), graph (>= 1.64.0), knitr (>= 1.28), methods (>= 3.6.0), plyr (>= 1.8.6), reshape2 (>= 1.4.3), rlang (>= 0.4.5), rmarkdown (>= 2.1), tidyr (>= 1.0.2), viridisLite (>= 0.3.0)
otherwise use of "%>%" will not work and ggplot plots cannot be layouted by the user. also report will currently not work (would need to load packages in the beginning).
viridisLite could also go to depend such that users can choose colorpallette. package colorspace had been contained in depends for the same reason, because it may contain useful color palettes
@eisenman I guess you changed that. any objections?