Update num_enum requirement from 0.6.1 to 0.7.0 (#190)

Updates the requirements on [num_enum](https://github.com/illicitonion/num_enum) to permit the latest version.
- [Commits](https://github.com/illicitonion/num_enum/commits)

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

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protocol/Cargo.toml

@@ -15,7 +15,7 @@ byteorder = "1"
 ordered-float = "3.0.0"
 uuid = "1"
 chrono = "0.4.26"
-num_enum = "0.6.1"
+num_enum = "0.7.0"
 derive_more = "0.99"
 
 [dev-dependencies]