Update env_logger requirement from ~0.8 to ~0.9

Updates the requirements on [env_logger](https://github.com/env-logger-rs/env_logger) to permit the latest version.
- [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](https://github.com/env-logger-rs/env_logger/compare/v0.8.0...v0.9.0)

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

tools/cli/Cargo.toml

@@ -21,7 +21,7 @@ test = false
 [dependencies]
 combine = "~4.3"
 dirs = "~3.0"
-env_logger = "~0.8"
+env_logger = "~0.9"
 failure = "~0.1"
 failure_derive = "~0.1"
 getopts = "~0.2"