Reverting node and npm engine

Renovate bot ignored the engine at least still v1 of package.json has been used.

Author: HLeithner

package.json

@@ -40,7 +40,6 @@
     ]
   },
   "engines": {
-    "node": ">=18.0",
-    "npm": ">=8.0"
+    "node": ">=16.14"
   }
 }