fix: update the node version to 16 on package.json (#656)

We currently provide support for nx@16.10.0, which is compatible with node v16.
This commit updates the minimum node version required for this package to reflect
that compatibility.

Author: dianjuar

packages/ngx-deploy-npm/package.json

@@ -6,7 +6,7 @@
   "generators": "./generators.json",
   "executors": "./executors.json",
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=16.0.0"
   },
   "peerDependencies": {
     "@nx/devkit": ">=16.0.0 <=21.0.0",