fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-EXPRESSJWT-575022

Author: snyk-bot

package-lock.json

@@ -110,7 +110,7 @@
     "download": "^8.0.0",
     "errorhandler": "^1.5.1",
     "express": "^4.17.1",
-    "express-jwt": "3.0.0",
+    "express-jwt": "6.0.0",
     "express-rate-limit": "^5.1.3",
     "express-robots-txt": "^0.4.1",
     "express-security.txt": "^2.0.0",