AdvancedKits v1.22.7

✦ Changes:
● Updated all libraries to the latest version.
● Added %advancedkits_total_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_available_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_unavailable_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_locked_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_purchasable_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_overused_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_owned_kits_<category>% PlaceholderAPI placeholder.​

✦ Changes:
● Updated all libraries to the latest version.
● Allows all PlaceholderAPI placeholders on menu filler items.
● Now the refresh delay of menus will be applied to active menu fillers.
● Added caching for current items on menu fillers.​

✦ Changes:
● Updated all libraries to the latest version.
● Fixed a few issues with buy upgrade cooldowns.
● Fixed a few issues with user saving data.​

✦ Changes:
● Updated all libraries to the latest version.
● Removed a few unused libraries.
● Optimized the options on custom display items.
● Fixed another issue with the unbreakable option on the display items.​

✦ Changes:
● Added the ability to use custom items from the ItemsAdder plugin.
● Other general optimizations.​

✦ Changes:
● Fixed an issue with glow and unbreakable options on the display items.
● Removed the KitData interface from the API.
● Added DataSave interface on the API.
● Many other changes to the code.​

✦ Changes:
● Updated all libraries to the latest version.
● Optimized the heads with textures on legacy versions.
● Added the ability to use heads from the HeadDatabase plugin.
● Added HIDE_UNBREAKABLE item flag on unbreakable display items.
● Added the ability to use item flags on display items.​

✦ Changes:
● Added the ability to use custom items from the ItemEdit plugin.
● When display items have no custom name will hide the vanilla name.
● Added better compatibility with legacy display items settings.​