replaced IllegalArgumentException with an UnknownTeamspeakEvent if the event is not registered

src/main/java/com/github/manevolent/ts3j/event/TS3Event.java

@@ -88,7 +88,7 @@ public interface TS3Event {
 	    case "notifychannelpermhints": // CLIENT
 		return new ChannelPermHintsEvent(command.toMap());
 	    default:
-		throw new IllegalArgumentException("unknown event: " + command.getName());
+	    return new UnknownTeamspeakEvent(command.getName(),command.toMap());
 	}
     }
 }

src/main/java/com/github/manevolent/ts3j/event/TS3Listener.java

@@ -57,4 +57,5 @@ public interface TS3Listener {
     default void onClientChatClosed(ClientChatClosedEvent e) {}
     default void onClientPermHints(ClientPermHintsEvent e) {}
     default void onChannelPermHints(ChannelPermHintsEvent e) {}
+    default void onUnknownEvent(UnknownTeamspeakEvent e){}
 }

src/main/java/com/github/manevolent/ts3j/event/UnknownTeamspeakEvent.java

@@ -0,0 +1,21 @@
+package com.github.manevolent.ts3j.event;
+
+import java.util.Map;
+
+public class UnknownTeamspeakEvent extends BaseEvent {
+    String command;
+
+    public UnknownTeamspeakEvent(String command, Map<String, String> map) {
+        super(map);
+        this.command = command;
+    }
+
+    public String getCommand() {
+        return command;
+    }
+
+    @Override
+    public void fire(TS3Listener listener) {
+        listener.onUnknownEvent(this);
+    }
+}

src/main/java/com/github/manevolent/ts3j/protocol/socket/client/LocalTeamspeakClientSocket.java

@@ -433,13 +433,8 @@ public class LocalTeamspeakClientSocket
         if (processor != null) {
             processor.process(client, singleCommand);
         } else if (singleCommand.getName().startsWith("notify")) {
-            try {
             TS3Event event = TS3Event.createEvent(singleCommand);
             commandExecutionService.submit(() -> listeners.forEach(event::fire));
-            } catch (IllegalArgumentException exception) {
-                exception.printStackTrace();
-            }
-
         } else {
             CommandProcessor awaitingCommandProcessor;