Update serial_test requirement from 2 to 3

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@v2.0.0...v2.0.0)

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

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

Cargo.toml

@@ -27,7 +27,7 @@ serde_regex = "1"
 serde_with = "3"
 serde_yaml = "0.9"
 serde_json = "1"
-serial_test = { version = "2", default-features = false }
+serial_test = { version = "3", default-features = false }
 sha2 = "0.10"
 strum = { version = "0.25", features = ["derive"] }
 tempfile = "3"