Remove final from window width/height

src/main/java/org/hirw/game/Window.java

@@ -13,7 +13,7 @@ import org.lwjgl.opengl.*;
 import org.lwjgl.system.*;
 
 public class Window {
-  private final int width, height;
+  private int width, height;
   private final String title;
   private long glfwWindow;