Migrate the Carpet codebase to Mojang Mappings

src/main/java/carpet/mixins/ChunkRegion_scarpetPlopMixin.java

@@ -1,17 +1,17 @@
 package carpet.mixins;
 
 import carpet.CarpetSettings;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.ChunkRegion;
+import net.minecraft.core.BlockPos;
+import net.minecraft.server.level.WorldGenRegion;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
-@Mixin(ChunkRegion.class)
+@Mixin(WorldGenRegion.class)
 public class ChunkRegion_scarpetPlopMixin
 {
-    @Inject(method = "markBlockForPostProcessing", at = @At("HEAD"), cancellable = true)
+    @Inject(method = "markPosForPostprocessing", at = @At("HEAD"), cancellable = true)
     private void markOrNot(BlockPos blockPos, CallbackInfo ci)
     {
         if (CarpetSettings.skipGenerationChecks.get()) ci.cancel();