Bump electron-packager from 14.0.6 to 14.2.1

Bumps [electron-packager](https://github.com/electron/electron-packager) from 14.0.6 to 14.2.1.
- [Release notes](https://github.com/electron/electron-packager/releases)
- [Changelog](https://github.com/electron/electron-packager/blob/master/NEWS.md)
- [Commits](electron/packager@v14.0.6...v14.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]