Bump jsonwebtoken from 8.5.1 to 9.0.0 in /src/client

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] <[email protected]>

Author: dependabot[bot]

src/client/package-lock.json

@@ -11,7 +11,7 @@
         "@testing-library/jest-dom": "^4.2.4",
         "@testing-library/react": "^9.5.0",
         "@testing-library/user-event": "^7.2.1",
-        "jsonwebtoken": "^8.5.1",
+        "jsonwebtoken": "^9.0.0",
         "lodash": "^4.17.20",
         "moment-timezone": "^0.5.43",
         "react": "^16.13.1",