⬆️ Update test-strategy requirement from ^0.3.1 to ^0.4.0 (#16)

Updates the requirements on [test-strategy](https://github.com/frozenlib/test-strategy) to permit the latest version.
- [Commits](frozenlib/test-strategy@v0.3.1...v0.4.0)

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

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

Cargo.toml

@@ -28,7 +28,7 @@ getset = "^0.1.2"
 [dev-dependencies]
 criterion = { version = "^0.5", features = ["html_reports"] }
 test-case = "3"
-test-strategy = "^0.3.1"
+test-strategy = "^0.4.0"
 mutants = "^0.0.3"
 serde_json = "1.0.116"