chore(deps): bump jsonwebtoken from 8.5.1 to 9.0.0 in /backend-auth

Bumps [jsonwebtoken](https://github.com/auth0/node-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)

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

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

Author: dependabot[bot]

backend-auth/package-lock.json

@@ -14,7 +14,7 @@
     "axios": "^0.19.2",
     "cors": "^2.8.5",
     "express": "^4.17.1",
-    "jsonwebtoken": "^8.5.1",
+    "jsonwebtoken": "^9.0.0",
     "npm": "^6.14.6",
     "pg": "^8.0.3",
     "pg-hstore": "^2.3.3",