This includes all changes from v5.1.11 to v5.2.1:

v5.1.11

• Fixed heads not being crafted (#14)
• Fixed IndexOutOfBoundsException in some cases.

v5.2

• Fixed crafting textures not loading for custom heads
• Reformatted crafting.yml
• Removed Halloween heads
• Heads can now be given to players via console
• Usage for /head has changed

v5.2.1

• Fixed some heads not being able to be crafted regardless of configuration
• Fixed texture issues for custom heads in crafting.

Won't say I've properly returned to Spigot yet because I'm still hesitant about a few things that happened this week. Whilst this is the case, all releases will go to Github temporarily.