Fix gamerule!

src/de/steamwar/misslewars/MissileWars.java

@@ -96,6 +96,7 @@ public class MissileWars extends JavaPlugin {
 
 		Bukkit.getWorlds().forEach(world -> {
 			world.setGameRule(GameRule.KEEP_INVENTORY, true);
+			world.setGameRule(GameRule.DO_TILE_DROPS, false);
 		});
 	}