New Features

• Added CoinsEngine Economy API support
• Added Treasury Economy API support
• [Compat] Added VoidChest compatibility module, contributed by @GeorgeV220 (first contribution)

Changes

• Number formatting now follows player's locale
• Messages now will delay to send while player logging in
• QUser now use Fork-Join-Pool to resolve
• InventoryWrapper can now verify that it is still valid

Performance

• Display item teleport now use Paper API if available
• Avoid create empty YamlConfiguration instance if no extra data for shop to save memory (lazy init)

Bug Fixes

• Compat/Addon's API getShops may returns the shops that not in selection and cause accident deletion if they in same chunk
• Added multiple missing localization keys
• Player may still to charged even ShopPriceChangeEvent has been cancelled
• Shop creation may failed if user entered a super large number like 999999999999999999999999999999.99 with default new generated configuration
• Some parts didn't use QuickShop's Permission Manager
• Some commands are using the wrong permission node
• quickshop.use permission node was ignored
• /qs staff clear and /qs staff remove won't save to database after modified staff list
• Shop display still spawned even player use /qs toggledisplay to turned it off if server enabled display auto despawn
• Fixed TNE economy type may populate StackOverFlow error while purchasing

Other
Several new Startup Flags have been added to allow users to fine-tune the internal implementation, which will be made available on-demand by developers in the support channel.