Update dependency @types/express to v4.17.20

Author: renovate[bot]

package.json

@@ -69,7 +69,7 @@
   },
   "devDependencies": {
     "@types/cors": "2.8.10",
-    "@types/express": "4.17.11",
+    "@types/express": "4.17.20",
     "@types/jest": "26.0.22",
     "@types/node": "14.14.43",
     "@typescript-eslint/eslint-plugin": "4.22.0",