Added:

• MiniMessage format support for regular messages and item properties.
• New item property clickCooldown to set cooldown for buttons.
• The equipItem property now can take item from another player's inventory.
• New action and rule called playerScope to execute actions or check rules for other player, found by specified name.

Fixed:

• Replacing colors for placeholders.
• Rule freeSlotCount doesn't count equipment slots now.
• Placeholders support in actions for variables (their short version). This is a breaking change. See explanation below.
• The result of setProperty action now is not saved after menu reopen, as it must be.
• Other minor optimizations.
• Fixed some mistakes in documentation.

Attention! Breaking changes!
The short format of actions for variables has breaking changes. Now separator for arguments is a double ' ::', not single. Sorry for this change but previous format broke support for other placeholders with single ':' separator.