chore: bump express from 4.19.2 to 4.21.0 (#152)

Bumps [express](https://github.com/expressjs/express) from 4.19.2 to 4.21.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.0/History.md)
- [Commits](expressjs/express@4.19.2...4.21.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -34,7 +34,7 @@
     "@types/mocha": "10.0.8",
     "@types/shelljs": "0.8.15",
     "assertthat": "6.5.2",
-    "express": "4.19.2",
+    "express": "4.21.0",
     "mocha": "10.7.3",
     "shelljs": "0.8.5",
     "ts-node": "10.9.2",