[Bleeding] Add the ability for plugins to ignore cancelled events when

using the new event system.

By: md_5 <md_5@bigpond.com>

paper-api/src/main/java/org/bukkit/plugin/PluginManager.java

@@ -140,6 +140,18 @@ public interface PluginManager {
      */
     public void registerEvent(Class<? extends Event> event, Listener listener, EventPriority priority, EventExecutor executor, Plugin plugin);
 
+    /**
+     * Registers the specified executor to the given event class
+     *
+     * @param event Event type to register
+     * @param listener Listener to register
+     * @param priority Priority to register this event at
+     * @param executor EventExecutor to register
+     * @param plugin Plugin to register
+     * @param ignoreCancelled Whether to pass cancelled events or not
+     */
+    public void registerEvent(Class<? extends Event> event, Listener listener, EventPriority priority, EventExecutor executor, Plugin plugin, boolean ignoreCancelled);
+
     /**
      * Enables the specified plugin
      * <p />