chore(deps): bump idna from 0.3.0 to 0.4.0

Bumps [idna](https://github.com/servo/rust-url) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/servo/rust-url/releases)
- [Commits](servo/rust-url@v0.3.0...v0.4.0)

---
updated-dependencies:
- dependency-name: idna
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -109,7 +109,7 @@ tower = { version = "0.4", optional = true }
 
 trust-dns-resolver = { version = "0.23.0-alpha", optional = true, features = ["serde-config"] }
 
-idna = "0.3"
+idna = "0.4"
 ipnet = "2.7"
 iprange = "0.6"
 regex = "1.4"