parameters 0.21.6

New supported models

• Support for models of class serp (serp).

Changes

• include_reference can now directly be set to TRUE in model_parameters()
  and doesn't require a call to print() anymore.

• compare_parameters() gains a include_reference argument, to add the
  reference category of categorical predictors to the parameters table.

• print_md() for compare_parameters() now by default uses the tinytable
  package to create markdown tables. This allows better control for column
  heading spanning over multiple columns.

Bug fixes

• Fixed issue with parameter names for model_parameters() and objects from
  package epiR.

• Fixed issue with exponentiate = TRUE for model_parameters() with models
  of class clmm (package ordinal), when model had no component column
  (e.g., no scale or location parameters were returned).

• include_reference now also works when factor were created "on-the-fly" inside
  the model formula (i.e. y ~ as.factor(x)).