Chore(deps): Update tokio-tungstenite requirement in /engineioxide

Updates the requirements on [tokio-tungstenite](https://github.com/snapview/tokio-tungstenite) to permit the latest version.
- [Changelog](https://github.com/snapview/tokio-tungstenite/blob/master/CHANGELOG.md)
- [Commits](snapview/tokio-tungstenite@v0.19.0...v0.20.0)

---
updated-dependencies:
- dependency-name: tokio-tungstenite
  dependency-type: direct:production
...

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

engineioxide/Cargo.toml

@@ -35,7 +35,7 @@ serde = { version = "1.0.155", features = ["derive"] }
 serde_json = "1.0.94"
 thiserror = "1.0.40"
 tokio = "1.26.0"
-tokio-tungstenite = "0.19.0"
+tokio-tungstenite = "0.20.0"
 tower = "0.4.13"
 tracing = "0.1.37"
 rand = "0.8.5"