chore: bump serial_test from 2.0.0 to 3.2.0

Bumps [serial_test](https://github.com/palfrey/serial_test) from 2.0.0 to 3.2.0.
- [Release notes](https://github.com/palfrey/serial_test/releases)
- [Commits](palfrey/serial_test@v2.0.0...v3.2.0)

---
updated-dependencies:
- dependency-name: serial_test
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Cargo.lock

@@ -18,4 +18,4 @@ cbindgen = "0.24.3"
 [dev-dependencies]
 tempfile = "3.5.0"
 assert-str = "0.1"
-serial_test = "2.0.0"
+serial_test = "3.2.0"