This is a huge update. All features have been tested, but there may still be bugs. If you find one, please report it in the discord.
This version has been tested on 1.21
New Features:

• Getting player skins in offline mode without Skins Restorer
• Empty Tracker items that can be crafted. Players will discover the recipe after they set a bounty. These trackers can be turned into Bounty trackers with a command, clicking a bounty poster, or by crafting it with a player head.
• Bounty Posters can be crafted with an empty map and a player head
• Bounty Posters and Bounty Trackers can be washed in a cauldron to get an empty map or empty tracker
• Players can place any item as a bounty with all the item data kept. This is a separate feature from the currency which can be enabled in the bounty-items section in the config.
• Added {notification}, {mode_raw}, {tax}, {bounty_currency}, {bounty_item_values}, & {bounty_items} as placeholders
• bedrock-gui.yml dropdown components can use the {player} placeholder to display online players and use [@ll] in the commands to execute a command with all players
• death tax override for combat logging
• PVP flags for Worldguard regions (only tested for 1.20.6)
• A sound will now be played while items are being given to the player
• The default gui.yml file will have a settings GUI
• Added hide-tooltip option for custom items (version 1.20.6 or higher)
• Added a steal-bounties option in the config that lets you steal your own bounty if you kill the player who set it on you
• Added the plugin-bounty-commands config option that lets you control which command aliases are used and which command the plugin uses when forcing players to run something
• You can now use -s in commands to make them silent (excluding setting a bounty)

Changes:

• Skins are now loaded more efficiently
• Bedrock toggle components can use a placeholder for the default state
• You can now use {items} in the list-setter message in the language.yml file to display the items on the bounty. (used with the /bounty check command)
• Wanted tags become smart... They will slow down updating if they cause server lag
• Items will stop being given if the player disconnects
• You can now specify on/off for the /bounty bdc command
• Moved the error message when a hidden player name couldn't be converted to a uuid when using sql
• Bounty board checks are no longer done when nobody is online
• The combat-safe message will now be sent when a player dies while combat logged

Fixes:

• Fixed an SQL memory leak
• bedrock-gui.yml can now be updated
• Bedrock GUIs now work with a proxy
• Skins are no longer loaded for GUIs that don't display them
• Tracker tab complete now works as intended
• Reward heads get the right lore
• Bounty boards no longer update in-game every interval while using SQL
• Fixed a bug where the combat tag message would be sent every time someone hit you
• Fixed a double webhook message
• Big bounty is now triggered if you place a bounty directly on the threshold
• Opped players now have perms to do /bounty tracker (player)
• Fixed a bug where top bounties with sql would only return the first player
• Tutorial command now parses the prefix
• You can no longer go out of bounds with the help command