Added support for Minecraft 1.13 (This release supports all versions from 1.8 - 1.13).
Latest ProtocolLib update is required for 1.13 compatibility:
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Java 8 is now required as ProtocolLib also requires it.
You may need to update your configuration for new material names if updating to 1.13. Some common items will be auto-fixed, e.g. DIAMOND_SPADE, WOOD_SWORD.