Bump signal-hook-mio from 0.2.3 to 0.2.4

Bumps [signal-hook-mio](https://github.com/vorner/signal-hook) from 0.2.3 to 0.2.4.
- [Changelog](https://github.com/vorner/signal-hook/blob/master/CHANGELOG.md)
- [Commits](vorner/signal-hook@v0.2.3...mio-0.2.4)

---
updated-dependencies:
- dependency-name: signal-hook-mio
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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