Allow diamond spikes to be enchanted, either like a sword (or an axe) or by a subset or enchantments:

• Looting,
• Smite / Bane of Arthropods / Sharpness,
• maybe Efficiency (to reduce the delay between damages ?).

Hey, that's actually a really good idea, but I've decided to not implement it. It would make the Spikes code too complex and I like them for how simple they are. Maybe I'll work on this in the future.