build(deps-dev): bump express from 4.18.2 to 4.21.2

Bumps [express](https://github.com/expressjs/express) from 4.18.2 to 4.21.2.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.2/History.md)
- [Commits](expressjs/express@4.18.2...4.21.2)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 4.21.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -14,7 +14,7 @@
   },
   "devDependencies": {
     "eslint": "8.56.0",
-    "express": "4.18.2",
+    "express": "4.21.2",
     "mocha": "10.2.0",
     "nyc": "15.1.0",
     "restify": "8.6.1",