Fixes #87 - Adds support for IEvent / IGameEvent type of EventListeners

src/Impostor.Api/Events/EventPriority.cs

@@ -7,6 +7,6 @@
         Normal = 2,
         High = 3,
         Highest = 4,
-        Monitor = 5
+        Monitor = 5,
     }
-}
+}

src/Impostor.Plugins.Example/Handlers/GameEventListener.cs

@@ -5,6 +5,12 @@ namespace Impostor.Plugins.Example.Handlers
 {
     public class GameEventListener : IEventListener
     {
+        [EventListener(EventPriority.Monitor)]
+        public void OnGame(IGameEvent e)
+        {
+            Console.WriteLine(e.GetType().Name + " triggered");
+        }
+
         [EventListener]
         public void OnGameCreated(IGameCreatedEvent e)
         {

src/Impostor.Server/Events/EventManager.cs

@@ -91,11 +91,15 @@ namespace Impostor.Server.Events
         {
             var eventType = typeof(TEvent);
             var interfaces = eventType.GetInterfaces();
-            if (interfaces.Length > 0 && _temporaryEventListeners.TryGetValue(interfaces[0], out var cb))
+
+            foreach (var @interface in interfaces)
             {
-                foreach (var eventListener in cb.GetEventListeners())
+                if (_temporaryEventListeners.TryGetValue(@interface, out var cb))
                 {
-                    yield return new EventHandler(null, eventListener);
+                    foreach (var eventListener in cb.GetEventListeners())
+                    {
+                        yield return new EventHandler(null, eventListener);
+                    }
                 }
             }
 
@@ -120,9 +124,9 @@ namespace Impostor.Server.Events
                 }
             }
 
-            if (_temporaryEventListeners.TryGetValue(eventType, out cb))
+            if (_temporaryEventListeners.TryGetValue(eventType, out var cb2))
             {
-                foreach (var eventListener in cb.GetEventListeners())
+                foreach (var eventListener in cb2.GetEventListeners())
                 {
                     yield return new EventHandler(null, eventListener);
                 }