Update test-strategy requirement from 0.1.2 to 0.2.0

Updates the requirements on [test-strategy](https://github.com/frozenlib/test-strategy) to permit the latest version.
- [Release notes](https://github.com/frozenlib/test-strategy/releases)
- [Commits](https://github.com/frozenlib/test-strategy/commits)

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

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

Cargo.toml

@@ -21,7 +21,7 @@ assert_matches = "1.5.0"
 criterion = "0.3.5"
 json = "0.12.4"
 proptest = "1.0.0"
-test-strategy = "0.1.2"
+test-strategy = "0.2.0"
 
 [lib]
 bench = false