graphics, grDevices, magrittr, methods, purrr (>= 0.3.0),
rlang (>= 0.3.0), stats, utils, Rcpp
knitr, lme4, mvtnorm, rmarkdown, roxygen2, spelling,
testthat, covr
covr, knitr, lme4, mvtnorm, rmarkdown, roxygen2, spelling,
testthat, tools