chore(rust)(deps): update testresult requirement in /wnfs (#411)

Updates the requirements on [testresult](https://github.com/wiktor-k/testresult) to permit the latest version.
- [Commits](wiktor-k/testresult@v0.3.0...v0.4.0)

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

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

wnfs/Cargo.toml

@@ -64,7 +64,7 @@ serde_json = "1.0.103"
 sha2 = "0.10"
 test-log = "0.2"
 test-strategy = "0.3"
-testresult = "0.3.0"
+testresult = "0.4.0"
 tiny-bip39 = "1.0"
 wnfs-common = { path = "../wnfs-common", features = ["test_utils"] }
 wnfs-nameaccumulator = { path = "../wnfs-nameaccumulator", default-features = false, features = ["rug"] }