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>