Bump socket2 from 0.5.6 to 0.5.7 (#284)

Bumps [socket2](https://github.com/rust-lang/socket2) from 0.5.6 to 0.5.7.
- [Release notes](https://github.com/rust-lang/socket2/releases)
- [Changelog](https://github.com/rust-lang/socket2/blob/master/CHANGELOG.md)
- [Commits](rust-lang/socket2@v0.5.6...v0.5.7)

---
updated-dependencies:
- dependency-name: socket2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]