fix: Corrects method signature for required getHandlerList in events #27

The method needs to be static or an IllegalPluginAccessException is thrown when trying to use the event

src/main/java/com/craftaro/skyblock/api/event/island/IslandInviteEvent.java

@@ -24,7 +24,7 @@ public class IslandInviteEvent extends IslandEvent {
         return HANDLERS;
     }
 
-    public HandlerList getHandlerList() {
+    public static HandlerList getHandlerList() {
         return HANDLERS;
     }
 }

src/main/java/com/craftaro/skyblock/api/event/island/IslandOpenEvent.java

@@ -37,7 +37,7 @@ public class IslandOpenEvent extends IslandEvent implements Cancellable {
         return HANDLERS;
     }
 
-    public HandlerList getHandlerList() {
+    public static HandlerList getHandlerList() {
         return HANDLERS;
     }
 }

src/main/java/com/craftaro/skyblock/api/event/island/IslandStatusChangeEvent.java

@@ -35,7 +35,7 @@ public class IslandStatusChangeEvent extends IslandEvent implements Cancellable
         return HANDLERS;
     }
 
-    public HandlerList getHandlerList() {
+    public static HandlerList getHandlerList() {
         return HANDLERS;
     }
 }