Update rand requirement from 0.8 to 0.9

Updates the requirements on [rand](https://github.com/rust-random/rand) to permit the latest version.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.0...0.9.0)

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

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

Cargo.toml

@@ -52,7 +52,7 @@ proptest = "1.0"
 serde = "1"
 serde_json = "1"
 rayon = "1"
-rand = { version = "0.8", features = ["small_rng"] }
+rand = { version = "0.9", features = ["small_rng"] }
 pretty_assertions = "1.0"
 metrohash = "1"
 proptest-derive = "0.5"