Spigot 26.1.2 beta 1

Support for spigot 26.1.2
26.1.1 and 26.1 are untested but should work.

This version might contain some bugs, known or unknown. Feel free to report it to me on discord.
Known bugs, fix in progress:

Note: Some rendering bug are already present on previous versions. Some are a regression when upgrading to 26.1 version.

• Problem with rendering of slabs, stairs, fences and wall.
  • Pale oak
  • Mangrove
  • Cherry
  • Warped (slabs rendered as fullblock)
  • Crimson (slabs rendered as fullblock)
  • Bamboo
  • Resin
  • Mud
  • All Deepslate (slabs rendered as fullblock)
  • All Blackstone (slabs rendered as fullblock)
  • All Copper (slabs rendered as fullblock)
  • All Tuff
• Observers not rendered
• Item frames not rendered
• Shelves not rendered
• Copper golems not rendered
• Copper chains not rendered
• Copper bars not rendered
• Copper chests not rendered
• Copper lanterns not rendered
• Wildflowers not rendered
• Leaf Litter not rendered
• Cactus flower not rendered
• Bush and Firefly Bush not rendered
• Creaking Heart not rendered