Bumps [dlib](https://github.com/vberger/dlib) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/vberger/dlib/releases)
- [Commits](https://github.com/vberger/dlib/commits/v0.4.2)

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