Found an obsolete/platform-specific call in the following function:
  ‘.prepDevice’
Found the platform-specific device:
  ‘X11’
dev.new() is the preferred way to open a new device, in the unlikely
event one is needed.
.X.and.offset: no visible global function definition for ‘terms’
.X.and.offset: no visible global function definition for ‘model.matrix’
.X.and.offset: no visible global function definition for
  ‘delete.response’
.X.and.offset: no visible binding for global variable ‘na.fail’
.makervcolortheme: no visible global function definition for ‘colors’
.mlplot3: no visible global function definition for ‘par’
.mlplot3: no visible global function definition for ‘mtext’
.mvrnorm: no visible global function definition for ‘rnorm’
.plot.default.rv: no visible global function definition for ‘par’
.plot.default.rv : localAxis: no visible global function definition for
  ‘Axis’
.plot.default.rv : localBox: no visible global function definition for
  ‘box’
.plot.default.rv : localWindow: no visible global function definition
  for ‘plot.window’
.plot.default.rv : localTitle: no visible global function definition
  for ‘title’
.plot.default.rv: no visible global function definition for ‘plot.new’
.plot.xy.rv: no visible global function definition for ‘par’
.prepDevice: no visible global function definition for ‘pdf’
.prepDevice: no visible global function definition for ‘X11’
.rvmeansd: no visible binding for global variable ‘var’
as.rvsummary.data.frame : <anonymous>: no visible global function
  definition for ‘qnorm’
as.rvsummary.rvinteger: no visible global function definition for
  ‘quantile’
as.rvsummary.rvnumeric: no visible global function definition for
  ‘quantile’
hist.rv: no visible global function definition for ‘par’
hist.rv: no visible global function definition for ‘hist’
ivplot: no visible global function definition for ‘par’
ivplot : .cleanup: no visible global function definition for ‘par’
ivplot : .cleanup: no visible global function definition for ‘dev.off’
ivplot: no visible binding for global variable ‘plot’
ivplot: no visible global function definition for ‘axis’
ivplot: no visible global function definition for ‘mtext’
ivplot: no visible global function definition for ‘abline’
lines.rv: no visible global function definition for ‘lines’
mlplot.default: no visible global function definition for ‘par’
mlplot.default: no visible global function definition for ‘points’
mlplot.default: no visible global function definition for ‘plot’
mlplot.default: no visible global function definition for ‘axis’
mlplot.default: no visible global function definition for ‘abline’
mlplot_OLD_rvsummary: no visible global function definition for ‘par’
mlplot_OLD_rvsummary: no visible global function definition for
  ‘points’
mlplot_OLD_rvsummary: no visible global function definition for ‘plot’
mlplot_OLD_rvsummary: no visible global function definition for ‘axis’
points.rv: no visible global function definition for ‘points’
points.rvsummary: no visible global function definition for ‘points’
print.rvdf: no visible global function definition for ‘head’
print.rvdf: no visible global function definition for ‘tail’
quantile.rv: no visible binding for global variable ‘quantile’
rvcat: no visible global function definition for ‘rmultinom’
rvcov: no visible global function definition for ‘cov’
rvdens: no visible global function definition for ‘runif’
rvhist: no visible global function definition for ‘par’
rvintervals: no visible global function definition for ‘na.omit’
rvintervals : .summaries: no visible global function definition for
  ‘na.omit’
rvmeanunif: no visible global function definition for ‘runif’
rvmodel.frame: no visible global function definition for ‘model.frame’
rvmodel.frame : .mf: no visible global function definition for
  ‘model.frame’
rvmodel.matrix : .mm: no visible global function definition for
  ‘model.matrix’
rvmultinom: no visible global function definition for ‘rmultinom’
rvquantile.rv : .f: no visible global function definition for
  ‘quantile’
rvquantile.rv: no visible binding for global variable ‘quantile’
Undefined global functions or variables:
  Axis X11 abline axis box colors cov delete.response dev.off head hist
  lines model.frame model.matrix mtext na.fail na.omit par pdf plot
  plot.new plot.window points qnorm quantile rmultinom rnorm runif tail
  terms title var
Consider adding
  importFrom("grDevices", "X11", "colors", "dev.off", "pdf")
  importFrom("graphics", "Axis", "abline", "axis", "box", "hist",
             "lines", "mtext", "par", "plot", "plot.new", "plot.window",
             "points", "title")
  importFrom("stats", "cov", "delete.response", "model.frame",
             "model.matrix", "na.fail", "na.omit", "qnorm", "quantile",
             "rmultinom", "rnorm", "runif", "terms", "var")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.