Bump jsonwebtoken and express-jwt in /examples/express-demo

Bumps [jsonwebtoken](https://github.com/auth0/node-jsonwebtoken) to 9.0.0 and updates ancestor dependency [express-jwt](https://github.com/auth0/express-jwt). These dependencies need to be updated together.


Updates `jsonwebtoken` from 8.5.1 to 9.0.0
- [Release notes](https://github.com/auth0/node-jsonwebtoken/releases)
- [Changelog](https://github.com/auth0/node-jsonwebtoken/blob/master/CHANGELOG.md)
- [Commits](auth0/node-jsonwebtoken@v8.5.1...v9.0.0)

Updates `express-jwt` from 7.7.7 to 8.2.0
- [Release notes](https://github.com/auth0/express-jwt/releases)
- [Changelog](https://github.com/auth0/express-jwt/blob/master/CHANGELOG.md)
- [Commits](auth0/express-jwt@v7.7.7...v8.2.0)

---
updated-dependencies:
- dependency-name: jsonwebtoken
  dependency-type: indirect
- dependency-name: express-jwt
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/express-demo/package-lock.json

@@ -18,6 +18,6 @@
   "dependencies": {
     "debug": "^2.6.9",
     "express": "^4.17.0",
-    "express-jwt": "^7.0.0"
+    "express-jwt": "^8.3.0"
   }
 }