Bump cookie and express in /tests/app

Bumps [cookie](https://github.com/jshttp/cookie) to 0.7.1 and updates ancestor dependency [express](https://github.com/expressjs/express). These dependencies need to be updated together.


Updates `cookie` from 0.6.0 to 0.7.1
- [Release notes](https://github.com/jshttp/cookie/releases)
- [Commits](jshttp/cookie@v0.6.0...v0.7.1)

Updates `express` from 4.21.0 to 4.21.1
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.1/History.md)
- [Commits](expressjs/express@4.21.0...4.21.1)

---
updated-dependencies:
- dependency-name: cookie
  dependency-type: indirect
- dependency-name: express
  dependency-type: direct:development
...

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

Author: dependabot[bot]

tests/app/package-lock.json

@@ -7,7 +7,7 @@
         "body-parser": "^1.19.0",
         "css-loader": "^5.0.1",
         "eslint": "^7.17.0",
-        "express": "^4.17.1",
+        "express": "^4.21.1",
         "multer": "^1.4.2"
     }
 }