Add rehydration spawn reason

Author: PseudoKnight

src/main/java/com/laytonsmith/abstraction/enums/MCSpawnReason.java

@@ -58,4 +58,5 @@ public enum MCSpawnReason {
 	ENCHANTMENT,
 	TRIAL_SPAWNER,
 	POTION_EFFECT,
+	REHYDRATION,
 }