1. Changed the inventory framework.
2. Added latest support to FancyHolograms.
3. Fixed a lot of little bugs.
1. Added a Spin open mode with a weighted reveal animation.
2. Added rarity tiers and per-reward weights.
3. Added a preview GUI showing drop chances.
4. Added multi-open to open many keys at once.
5. Added bonus rewards on a single open.
6. Added rare-win broadcasts, fireworks and a pity counter.
1. Fixed not giving keys to players that never joined before.
2. Made the give key command run async, for offline players.
