Bumps [app-builder-lib](https://github.com/electron-userland/electron-builder) from 21.0.5 to 21.0.6.
- [Release notes](https://github.com/electron-userland/electron-builder/releases)
- [Changelog](https://github.com/electron-userland/electron-builder/blob/master/CHANGELOG.md)
- [Commits](https://github.com/electron-userland/electron-builder/compare/v21.0.5...v21.0.6)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>