Bump @types/express from 4.17.8 to 4.17.13 in /middleware

Bumps [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express) from 4.17.8 to 4.17.13.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)

---
updated-dependencies:
- dependency-name: "@types/express"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

middleware/package-lock.json

@@ -19,7 +19,7 @@
     "request": "^2.88.2"
   },
   "devDependencies": {
-    "@types/express": "^4.17.8",
+    "@types/express": "^4.17.13",
     "@types/request": "^2.48.5",
     "@types/supertest": "^2.0.10",
     "ava": "^3.12.1",