Update pretty_env_logger requirement from 0.3.0 to 0.4.0

Updates the requirements on [pretty_env_logger](https://github.com/seanmonstar/pretty-env-logger) to permit the latest version.
- [Release notes](https://github.com/seanmonstar/pretty-env-logger/releases)
- [Commits](https://github.com/seanmonstar/pretty-env-logger/compare/v0.3.0...v0.4.0)

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

Cargo.toml

@@ -46,7 +46,7 @@ skeptic = "0.13.3"
 skeptic = "0.13.3"
 tempfile = "3.0.3"
 indoc = "0.3.1"
-pretty_env_logger = "0.3.0"
+pretty_env_logger = "0.4.0"
 
 [package.metadata.docs.rs]
 features = ["all"]