Update test-case requirement from 1.2.0 to 3.3.1

Updates the requirements on [test-case](https://github.com/frondeus/test-case) to permit the latest version.
- [Release notes](https://github.com/frondeus/test-case/releases)
- [Changelog](https://github.com/frondeus/test-case/blob/master/CHANGELOG.md)
- [Commits](frondeus/test-case@v1.2.0...v3.3.1)

---
updated-dependencies:
- dependency-name: test-case
  dependency-type: direct:production
...

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

Cargo.toml

@@ -69,7 +69,7 @@ termion = "1.5.5"
 pretty_env_logger = "0.4.0"
 # turle_teleop
 log4rs = "1.2"
-test-case = "1.2.0"
+test-case = "3.3.1"
 ctrlc = "3.1.6"
 
 # async examples