patchwork 1.3.0

• free() now better aligns plots in horizontal direction
• Plot backgrounds are now always placed beneath all other elements in the
  patchwork (#370)
• Axis titles can now reliably be collected even with faceted plots (#367)
• Native support for gt objects, either adding them directly or controlling
  their layout with wrap_table()
• Empty patches no longer breaks up axis title collection (#375)
• wrap_ggplot_grob() now respects auto-tagging (#363)
• Fix a bug where guide collecting would prevent proper axes collecting (#359)
• Fix a bug in free() where tags placed on top of the plot region would become
  missing (#350)
• free() gains type and side argument. The first to control whether to
  free the panel, the label, or the space occupied outside the panel, the second
  to control which sides it applies to (#345 and #379)
• as.list() is now provided for patchwork objects to get the plots in a
  patchwork as a list. This also allows the use of lapply() and friends on
  patchwork objects (#381)
• The default arguments in plot_annotation() and plot_layout() are now
  waiver() allowing the use of NULL to remove an already set value (#198)
• Guide and axis merging is slightly more robust when it comes to merging if
  different graphical parameters that means the same are used (e.g. "black" and
  "#000000") (#369)
• fix a bug when collecting guides with null unit key size (#390)
• Added nest() to explicitly nest a patchwork on the LHS of an operator