Update flaky_test requirement from 0.1 to 0.2

Updates the requirements on [flaky_test](https://github.com/denoland/flaky_test) to permit the latest version.
- [Release notes](https://github.com/denoland/flaky_test/releases)
- [Commits](denoland/flaky_test@v0.1.0...v0.2.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -25,7 +25,7 @@ portable-atomic = { version = "1", optional = true, default-features = false }
 [dev-dependencies]
 atomic-waker = "1"
 easy-parallel = "3"
-flaky_test = "0.1"
+flaky_test = "0.2"
 flume = { version = "0.11", default-features = false }
 futures-lite = "2.0.0"
 once_cell = "1"