build(deps): bump hostname from 0.4.1 to 0.4.2 (#710)

Bumps [hostname](https://github.com/djc/hostname) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/djc/hostname/releases)
- [Commits](djc/hostname@v0.4.1...v0.4.2)

---
updated-dependencies:
- dependency-name: hostname
  dependency-version: 0.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Andi Pieper <apieper@mozilla.com>

Author: dependabot[bot]