Update cidr requirement from 0.2 to 0.3

Updates the requirements on [cidr](https://github.com/stbuehler/rust-cidr) to permit the latest version.
- [Release notes](https://github.com/stbuehler/rust-cidr/releases)
- [Changelog](https://github.com/stbuehler/rust-cidr/blob/master/CHANGELOG.md)
- [Commits](stbuehler/rust-cidr@cidr-0.2.0...cidr-0.3.0)

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

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

Cargo.toml

@@ -14,7 +14,7 @@ default = []
 unsafe-state-file = []
 
 [dependencies]
-cidr = { version = "0.2", features = ["serde"] }
+cidr = { version = "0.3", features = ["serde"] }
 log = { version = "0.4" }
 regex = "1"
 serde = { version = "1", features = ["derive"] }