Release v2.2.0 · levisc8/spind

`spind` v2.2.0

deprecated customize_plot and plot arguments in favor of new plot methods
for GEE and WRM.
- GEE and WRM now return the ggplot object in their respective classes.
  Users can modify them from there rather than use the clunky interface to
  modify them within the model function call.
rvi.plot and th.indep now return
ggplot as list items along with the values that they returned before.
customize_plot arguments have been deprecated in every function it appears in.
plot.ROC in th.indep is also deprecated.
covar.plot's customize_plot argument is also deprecated, but the plot
argument is not, as this controls which statistic is plotted (variance or covariance)
rather than whether or not a plot is generated at all. This function no longer
prints the ggplot object by default, but returns it as part of a list.
deprecated color.maps arguments to upscale and adjusted.actuals.
Some documentation clarification and typo fixes.
Updated a couple error messages for consistency across functions.
Behind the scenes, moved all plotting functions that use ggplot2 to tidy
evaluation equivalents. If you're interested, more on that here.