Bump test-harness from 0.2.0 to 0.3.0 (#1131)

Bumps [test-harness](https://github.com/jbr/test-harness) from 0.2.0 to 0.3.0.
- [Release notes](https://github.com/jbr/test-harness/releases)
- [Changelog](https://github.com/jbr/test-harness/blob/main/CHANGELOG.md)
- [Commits](jbr/test-harness@v0.2.0...v0.3.0)

---
updated-dependencies:
- dependency-name: test-harness
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

test-support/Cargo.toml

@@ -33,4 +33,4 @@ pretty_assertions = "1.4.0"
 rand = "0.8.5"
 base64 = "0.22.1"
 querystrong = "0.3.0"
-test-harness = "0.2.0"
+test-harness = "0.3.0"