Serializable -> JsonSerializable

core/src/mindustry/game/Rules.java

@@ -137,7 +137,7 @@ public class Rules{
     }
 
     /** A simple map for storing TeamRules in an efficient way without hashing. */
-    public static class TeamRules implements Serializable{
+    public static class TeamRules implements JsonSerializable{
         final TeamRule[] values = new TeamRule[Team.all.length];
 
         public TeamRule get(Team team){

core/src/mindustry/game/SpawnGroup.java

@@ -18,7 +18,7 @@ import static mindustry.Vars.*;
  * weapon equipped, ammo used, and status effects.
  * Each spawn group can have multiple sub-groups spawned in different areas of the map.
  */
-public class SpawnGroup implements Serializable{
+public class SpawnGroup implements JsonSerializable{
     public static final int never = Integer.MAX_VALUE;
 
     /** The unit type spawned */