Update env_logger requirement from 0.10 to 0.11

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](rust-cli/env_logger@v0.10.0...v0.11.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

tokio-postgres/Cargo.toml

@@ -67,7 +67,7 @@ socket2 = { version = "0.5", features = ["all"] }
 [dev-dependencies]
 futures-executor = "0.3"
 criterion = "0.5"
-env_logger = "0.10"
+env_logger = "0.11"
 tokio = { version = "1.0", features = [
     "macros",
     "net",