Wither Spawn Fix [Fabric/Forge/Neoforge]

This is a simple mod that fixes the annoying issue of grass, snow layers, flower pots, carpets and other small blocks obstructing Wither spawning! 

(Warning: Normal spawn rules apply. If you're afraid to lose something, don't have them under the Wither when spawning!)

Tested on:

• Grass
• Snow layers
• Flower pots
• Carpets