Update env_logger requirement from 0.9 to 0.10

Updates the requirements on [env_logger](https://github.com/rust-cli/env_logger) to permit the latest version.
- [Release notes](https://github.com/rust-cli/env_logger/releases)
- [Changelog](https://github.com/rust-cli/env_logger/blob/main/CHANGELOG.md)
- [Commits](https://github.com/rust-cli/env_logger/compare/v0.9.0...v0.10.0)

---
updated-dependencies:
- dependency-name: env_logger
  dependency-type: direct:production
...

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

tokio-postgres/Cargo.toml

@@ -62,7 +62,7 @@ tokio-util = { version = "0.7", features = ["codec"] }
 [dev-dependencies]
 futures-executor = "0.3"
 criterion = "0.4"
-env_logger = "0.9"
+env_logger = "0.10"
 tokio = { version = "1.0", features = [
     "macros",
     "net",