Replace deprecated bukkit api usage

Author: PrimordialMoros

fabric/src/main/java/me/moros/bending/fabric/mixin/entity/LivingEntityMixin.java

@@ -33,6 +33,7 @@
 import net.minecraft.world.level.storage.loot.parameters.LootContextParams;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.ModifyVariable;
@@ -74,6 +75,7 @@ public abstract class LivingEntityMixin extends EntityMixin {
     ci.cancel();
   }
 
+  @Unique
   private LivingEntity get() {
     return (LivingEntity) (Object) this;
   }

paper/src/main/java/me/moros/bending/paper/platform/world/BukkitWorld.java

@@ -47,6 +47,7 @@
 import org.bukkit.Location;
 import org.bukkit.World.Environment;
 import org.bukkit.block.TileState;
+import org.bukkit.entity.FallingBlock;
 import org.bukkit.util.BoundingBox;
 import org.bukkit.util.RayTraceResult;
 import org.bukkit.util.Vector;
@@ -205,9 +206,11 @@ public Entity dropItem(Position pos, ItemSnapshot item, boolean canPickup) {
   public Entity createFallingBlock(Position pos, BlockState state, boolean gravity) {
     var loc = new Location(handle(), pos.x(), pos.y(), pos.z());
     var data = PlatformAdapter.toBukkitData(state);
-    var bukkitEntity = handle().spawnFallingBlock(loc, data);
-    bukkitEntity.setGravity(gravity);
-    bukkitEntity.setDropItem(false);
+    var bukkitEntity = handle().spawn(loc, FallingBlock.class, fb -> {
+      fb.setBlockData(data);
+      fb.setGravity(gravity);
+      fb.setDropItem(false);
+    });
     return PlatformAdapter.fromBukkitEntity(bukkitEntity);
   }