ci: update redis requirement from 0.25.1 to 0.27.4 (#15)

Updates the requirements on [redis](https://github.com/redis-rs/redis-rs) to permit the latest version.
- [Release notes](https://github.com/redis-rs/redis-rs/releases)
- [Commits](redis-rs/redis-rs@redis-0.25.1...redis-0.27.4)

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

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Cargo.toml

@@ -17,5 +17,5 @@ serde_json = "1.0"
 
 [dev-dependencies]
 chrono = "0.4.23"
-redis = "0.25.1"
+redis = "0.27.4"
 tokio = { version = "1.22.0", features = ["macros"] }