Bump env_logger from 0.8.4 to 0.9.0 (#242)

Bumps [env_logger](https://github.com/env-logger-rs/env_logger) from 0.8.4 to 0.9.0.
- [Release notes](https://github.com/env-logger-rs/env_logger/releases)
- [Changelog](https://github.com/env-logger-rs/env_logger/blob/main/CHANGELOG.md)
- [Commits](rust-cli/env_logger@v0.8.4...v0.9.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frame/beefy-mmr/primitives/Cargo.toml

@@ -12,7 +12,7 @@ log = { version = "0.4", optional = true, default-features = false }
 tiny-keccak = { version = "2.0.2", features = ["keccak"], optional = true }
 
 [dev-dependencies]
-env_logger = "0.8"
+env_logger = "0.9"
 hex = "0.4"
 hex-literal = "0.3"