build(deps): 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] <support@github.com>

Author: dependabot[bot]

Diff for: Cargo.toml

@@ -33,7 +33,7 @@ fxhash = "0.2.1"
 lazy_static = "1.2"
 quickcheck = "1.0"
 pretty_assertions = "1.0.0"
-rand = "^0.8"
+rand = "^0.9"
 is_sorted = "0.1"
 
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