ggstats 0.2.0

• Support for pairwise contrasts (#14)
• New argument tidy_args in ggcoef_*() to pass additional arguments to
  broom.helpers::tidy_plus_plus() and to tidy_fun (#17)
• Now requires ggplot2 version 3.4.0 or more (#15)
• Following change in geom_rect(), the size aesthetic is now deprecated
  in geom_stripped_cols() and geom_stripped_rows(): please use the
  linewidth aesthetic instead (#15)