pkg: Demo relies on @octokit/rest, which is node 18+

Author: ntucker

examples/normalizr-redux/package.json

@@ -9,6 +9,9 @@
   "scripts": {
     "start": "babel-node ./ --root-mode upward --extensions '.ts,.tsx,.js'"
   },
+  "engines": {
+    "node": ">=18.0"
+  },
   "devDependencies": {
     "@babel/core": "7.26.0",
     "@babel/node": "7.26.0",