SPIGOT-7747: Mob head is not dropped when mob was blown up by a charged creeper

By: md_5 <git@md-5.net>

paper-server/nms-patches/net/minecraft/world/entity/monster/EntityCreeper.patch

@@ -64,7 +64,7 @@
 +            // CraftBukkit end
              this.dead = true;
 -            this.level().explode(this, this.getX(), this.getY(), this.getZ(), (float) this.explosionRadius * f, World.a.MOB);
-+            this.level().explode(this, this.level().damageSources().explosion(this, this.entityIgniter, net.minecraft.world.damagesource.DamageTypes.EXPLOSION), null, this.getX(), this.getY(), this.getZ(), event.getRadius(), event.getFire(), World.a.MOB); // CraftBukkit
++            this.level().explode(this, net.minecraft.world.level.Explosion.getDefaultDamageSource(this.level(), this).customEntityDamager(this.entityIgniter), null, this.getX(), this.getY(), this.getZ(), event.getRadius(), event.getFire(), World.a.MOB); // CraftBukkit
              this.spawnLingeringCloud();
              this.triggerOnDeathMobEffects(Entity.RemovalReason.KILLED);
 -            this.discard();