Bump proptest-derive from 0.3.0 to 0.4.0

Bumps [proptest-derive](https://github.com/proptest-rs/proptest) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/proptest-rs/proptest/releases)
- [Changelog](https://github.com/proptest-rs/proptest/blob/0.4.0/CHANGELOG.md)
- [Commits](proptest-rs/proptest@proptest-derive-0.3.0...0.4.0)

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

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

Cargo.toml

@@ -46,7 +46,7 @@ optional = true
 bincode = "1"
 criterion = "0.4"
 hex = "0.4.3"
-proptest-derive = "0.3"
+proptest-derive = "0.4"
 lazy_static = "1.4"
 proptest = "1.0"
 rand = "0.8"