On Mac, a downloaded app update will be installed after quit even if the user clicked Cancel in the update prompt.
Cancel
This option isn't working:
https://github.com/Automattic/simplenote-electron/blob/c9b8d4a606a508a35758e120cf135cbfb5fef394/desktop/updater/auto-updater/index.js#L22
https://www.electron.build/auto-update#api
Closing as macOS is unsupported and the App Store native app should be used.