quitAndInstall

Restarts the app and installs the update after it has been downloaded. It should only be called after update-downloaded has been emitted.

Under the hood calling autoUpdater.quitAndInstall() will close all application windows first, and automatically call app.quit() after all windows have been closed.

Note: It is not strictly necessary to call this function to apply an update, as a successfully downloaded update will always be applied the next time the application starts.