Carpet Mod alpha2 for Minecraft 1.13.1 - derpfix

Told you, its alpha ;)

Yeah, who think its still 2017? Me neither, but I defaulted spawning in alpha2 to 1.12 internally. No biggy - just run /carpet mobSpawningAlgorithm 1.13 to fix it, but you can also want to use that extra patch I prepared.