Moved thorium into the 'next tier' on Erekir

core/src/mindustry/maps/planet/AsteroidGenerator.java

@@ -147,6 +147,9 @@ public class AsteroidGenerator extends BlankPlanetGenerator{
         state.rules.borderDarkness = false;
         state.rules.environment = Env.space;
         state.rules.waves = true;
+
+        //TODO ???
+        //state.rules.hiddenBuildItems.addAll(Items.plastanium, Items.surgeAlloy);
         //TODO maybe make this on by default everywhere
         state.rules.showSpawns = true;
         //TODO better wavegen, do it by hand even