Update rand requirement from 0.9 to 0.10

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](https://github.com/rust-random/rand/compare/rand_core-0.9.1...0.10.0)

---
updated-dependencies:
- dependency-name: rand
  dependency-version: 0.10.0
  dependency-type: direct:production
...

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