Shift priority of EntityPortalEnterEvent to HIGH

https://github.com/BentoBoxWorld/BentoBox/issues/1866

This will allow other plugins running at NORMAL to cancel the event
before BentoBox does something.

src/main/java/world/bentobox/bentobox/listeners/PortalTeleportationListener.java

@@ -57,7 +57,7 @@ public class PortalTeleportationListener implements Listener {
      * Fires the event if nether or end is disabled at the system level
      * @param e - EntityPortalEnterEvent
      */
-    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    @EventHandler(priority = EventPriority.HIGH, ignoreCancelled = true)
     public void onPlayerPortal(EntityPortalEnterEvent e) {
         if (!(e.getEntity() instanceof Player)) {
             return;