fix: close and recreate macOS windows safely

electron/main/updater.ts

@@ -133,7 +133,7 @@ export class AppUpdater extends EventEmitter {
   /**
    * Set the main window for sending update events
    */
-  setMainWindow(window: BrowserWindow): void {
+  setMainWindow(window: BrowserWindow | null): void {
     this.mainWindow = window;
   }