Changelog:
 - Updated to Spigot 1.21
 - Added a "/cc cooldowns" command. By running "/cc cooldowns" a player can see their own current cooldowns, if they have the commandcooldown.cooldowns permission (given by default). Administrators can view other player's cooldowns by running "/cc cooldowns [playerName/UUID]" (permission required is commandcooldown.cooldowns.others).
 - Added MySQL Support. Player cooldown data can now be stored locally or with a MySQL database, which can be enabled in the config.yml file.
 - The CommandCooldown editor now displays duration in a nice format instead of displaying with only seconds.
 
Bug Fixes:
 - Fixed arguments sometimes not being saved properly when adding a command cooldown.
 - Fixed messages being sent in chat when filling out prompts in the editor.
 - Fixed the calculation for the total number of pages in "/cc help".
 - Editing cooldowns with permissions now ignores permissions with the value false. Thanks to 
MatiRosen.