chore(cargo): bump testdir from 0.7.3 to 0.8.0

Bumps [testdir](https://github.com/flub/testdir) from 0.7.3 to 0.8.0.
- [Changelog](https://github.com/flub/testdir/blob/main/CHANGELOG.md)
- [Commits](https://github.com/flub/testdir/compare/v0.7.3...v0.8.0)

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

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

Cargo.toml

@@ -103,7 +103,7 @@ log = "0.4"
 pretty_env_logger = "0.5"
 proptest = { version = "1", default-features = false, features = ["std"] }
 tempfile = "3"
-testdir = "0.7.3"
+testdir = "0.8.0"
 tokio = { version = "1", features = ["parking_lot", "rt-multi-thread", "macros"] }
 pretty_assertions = "1.3.0"