Default world hint use dimension height requests

src/main/java/com/volmit/iris/Iris.java

@@ -607,8 +607,8 @@ public class Iris extends VolmitPlugin implements Listener {
             .seed(1337)
             .environment(dim.getEnvironment())
             .worldFolder(new File(worldName))
-            .minHeight(-64)
-            .maxHeight(320)
+            .minHeight(dim.getMinHeight())
+            .maxHeight(dim.getMaxHeight())
             .build();
 
         Iris.debug("Generator Config: " + w.toString());