chore(deps): bump proptest from 1.7.0 to 1.8.0

Bumps [proptest](https://github.com/proptest-rs/proptest) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/proptest-rs/proptest/releases)
- [Changelog](https://github.com/proptest-rs/proptest/blob/main/CHANGELOG.md)
- [Commits](proptest-rs/proptest@v1.7.0...v1.8.0)

---
updated-dependencies:
- dependency-name: proptest
  dependency-version: 1.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -46,7 +46,7 @@ candid_parser = "0.1.2"
 ic_principal = "0.1.0"
 maplit = "1.0.2"
 pretty_assertions = "1.4.0"
-proptest = "1.6.0"
+proptest = "1.8.0"
 rand = "0.9.0"
 slotmap = "1"
 tokio = { version = "1.39.3", features = ["full"] }