FastSurvival — Moon & Sky Survival Expansion

Fixes:

• Fixed moon generation crash on PaperMC (tested on paper-237)
• Fixed moon portal buttons not working.
• Tip: Use /moonmats in creative mode to get the minimum necessary materials to build a portal.
• Fixed other issues related to legacy API usages.

Features:

• Added the sky portal. Not accessible in survival mode for now but it will be in the future.
• Added Sky jet bow: Transports you to destination by walking over a trail of snow
• Added Sky explosive bow: Summons a ring of tnt blocks that get thrown at the objective one by one.
• Massive improvement to multi-target bow. Now it works in all directions.
• The electric bow effect is now much less destructive.
• Added a chance of skeleton spawning with sky jet and explosive bows (the chance is much geatrer on the sky)
• Lowered the chance of skeletons dropping their bow. It is now lower on the overworld than on the moon.
• Improvements on the generation of the sky 
• Rebalanced structure loots
• Small improvements to existing structures