Bump juniper_rocket from 0.8.1 to 0.9.0

Bumps [juniper_rocket](https://github.com/graphql-rust/juniper) from 0.8.1 to 0.9.0.
- [Release notes](https://github.com/graphql-rust/juniper/releases)
- [Changelog](https://github.com/graphql-rust/juniper/blob/master/release.toml)
- [Commits](graphql-rust/juniper@juniper_rocket-v0.8.1...juniper_rocket-v0.9.0)

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

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

Author: dependabot[bot]