refactor: add getPackageJson fn in constants

package.json

@@ -31,6 +31,7 @@
   },
   "main": "out/node/entry.js",
   "devDependencies": {
+    "@schemastore/package": "^0.0.6",
     "@types/body-parser": "^1.19.0",
     "@types/cookie-parser": "^1.4.2",
     "@types/express": "^4.17.8",
@@ -62,8 +63,8 @@
     "stylelint": "^13.0.0",
     "stylelint-config-recommended": "^3.0.0",
     "ts-node": "^9.0.0",
-    "wtfnode": "^0.8.4",
-    "typescript": "^4.1.3"
+    "typescript": "^4.1.3",
+    "wtfnode": "^0.8.4"
   },
   "resolutions": {
     "@types/node": "^12.12.7",