+ Add 1.19.1 and 1.19.2 support
+ Add MerchantGui#setOnTradeSelect
+ Add Pane#createBorder
* Fix ToggleButton not executing item events
* Fix ChestGui#setRows removing panes
* Fix inventories not restoring after a Gui#update call
* Fix nested panes ignoring visibility
* Fix MerchantGui#copy not copying all the data