Better fix to conform to tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/technical-features/messaging/agnostic/src/features/actual/message/message-channel-listener-injection-token.ts

@@ -9,7 +9,7 @@ export interface MessageChannel<Message> {
 export type ExtraData = { processId: number; frameId: number };
 
 export type MessageChannelHandler<Channel> = Channel extends MessageChannel<infer Message>
-  ? (message: Message, data: ExtraData | null) => void
+  ? (message: Message, data?: ExtraData) => void
   : never;
 
 export interface MessageChannelListener<Channel> {

packages/technical-features/messaging/electron/renderer/src/listening-of-messages/enlist-message-channel-listener.injectable.ts

@@ -11,7 +11,7 @@ const enlistMessageChannelListenerInjectable = getInjectable({
 
     return ({ channel, handler }) => {
       const nativeCallback = (event: IpcRendererEvent, message: unknown) => {
-        handler(message, null);
+        handler(message);
       };
 
       ipcRenderer.on(channel.id, nativeCallback);