Bump jsonwebtoken and web-ext

Bumps [jsonwebtoken](https://github.com/auth0/node-jsonwebtoken) to 9.0.0 and updates ancestor dependency [web-ext](https://github.com/mozilla/web-ext). 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](https://github.com/auth0/node-jsonwebtoken/compare/v8.5.1...v9.0.0)

Updates `web-ext` from 7.4.0 to 7.5.0
- [Release notes](https://github.com/mozilla/web-ext/releases)
- [Commits](https://github.com/mozilla/web-ext/compare/7.4.0...7.5.0)

---
updated-dependencies:
- dependency-name: jsonwebtoken
  dependency-type: indirect
- dependency-name: web-ext
  dependency-type: direct:development
...

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

package.json

@@ -25,7 +25,7 @@
     "stylelint": "^13.5.0",
     "stylelint-config-standard": "^20.0.0",
     "stylelint-order": "^4.0.0",
-    "web-ext": "^7.1.1",
+    "web-ext": "^7.5.0",
     "webextensions-jsdom": "^1.2.1"
   },
   "homepage": "https://github.com/mozilla/multi-account-containers#readme",