Update TechnicClient.java - Dispose screens

core/src/main/java/com/ghost/technic/TechnicClient.java

@@ -66,6 +66,9 @@ public class TechnicClient extends Game {
 
     @Override
     public void dispose() {
+        for (Screen screen : screenCache.values()) {
+            screen.dispose();
+        }
         skin.dispose();
     }
 }