For now after each click in GUI, we only update the click item instead of update whole GUI items, so this will improve plugin performance in some case.
Added menu.shop.click-update option, if you still like update whole GUI items, don't worry, simply enable this option and all will running like before.
Added sell.ignore-item-format-keys option, useful for people want to use fuzzy checking sell item.
Fixed ItemFormat sell method does not work in some case.
Fixed sometimes plugin display GUI error warning after use /shop reload in pre-1.21 version.