Update jsonwebtoken requirement from 8 to 9

Updates the requirements on [jsonwebtoken](https://github.com/Keats/jsonwebtoken) to permit the latest version.
- [Changelog](https://github.com/Keats/jsonwebtoken/blob/master/CHANGELOG.md)
- [Commits](Keats/jsonwebtoken@v8.0.0...v9.0.0)

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

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

Cargo.toml

@@ -30,7 +30,7 @@ either = "1.8.0"
 futures = { version = "0.3.15" }
 futures-core = { version = "0.3.15", optional = true }
 futures-util = { version = "0.3.15", optional = true }
-jsonwebtoken = "8"
+jsonwebtoken = "9"
 http = "0.2.5"
 http-body = "0.4.5"
 hyper = { version = "0.14.13", features = ["client", "http1", "stream", "tcp"] }