add moment.js

Author: Uwe Gruenheid

package-lock.json

@@ -19,6 +19,7 @@
     "dotenv": "^16.4.5",
     "lodash": "^4.17.21",
     "mkdirp": "^3.0.1",
+    "moment": "^2.30.1",
     "sync-request": "^6.1.0",
     "plantuml-encoder": "^1.4.0",
     "unxhr": "1.2.0",