Bump proptest from 1.1.0 to 1.2.0 (#986)

Bumps [proptest](https://github.com/proptest-rs/proptest) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/proptest-rs/proptest/releases)
- [Changelog](https://github.com/proptest-rs/proptest/blob/master/CHANGELOG.md)
- [Commits](proptest-rs/proptest@v1.1.0...v1.2.0)

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

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

northstar-runtime/Cargo.toml

@@ -75,7 +75,7 @@ seccomp = ["bindgen", "caps", "lazy_static", "memoffset", "nix", "npk"]
 [dev-dependencies]
 anyhow = { version = "1.0.71", features = ["backtrace"] }
 memfd = "0.6.2"
-proptest = "1.1.0"
+proptest = "1.2.0"
 serde_json = "1.0.95"
 tokio = { version = "1.28.0", features = ["test-util"] }
 tokio-test = "0.4.2"