Major changes for 1.12.2
For Minecraft/Bukkit 1.12.2 version (only usable in the 1.12 versions)
Changed :
- Radius where we can't place spawners around other spawners is now 9x9x9 centered on spawner.
- Added warning message when place or break events are cancelled.
- Changed tool item to a Blaze Rod and a blaze powder as special loot (20%)