Update serial_test requirement from 0.9 to 0.10 (#27)

Updates the requirements on [serial_test](https://github.com/palfrey/serial_test) to permit the latest version.
- [Release notes](https://github.com/palfrey/serial_test/releases)
- [Commits](palfrey/serial_test@v0.9.0...v0.10.0)

---
updated-dependencies:
- dependency-name: serial_test
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -43,7 +43,7 @@ openssl = "0.10"
 passivized_htpasswd = "0.0.3"
 passivized_test_support = "0.0.7"
 rand = "0.8"
-serial_test = "0.9"
+serial_test = "0.10"
 simple_logger = { version = "4.0", default-features = false, features = ["timestamps", "threads"] }
 tar = "0.4"
 thiserror = "1.0"