fix!: align to npm 10 node engine range

BREAKING CHANGE: `nopt` now supports node `^18.17.0 || >=20.5.0`

Author: hashtagchris

package.json

@@ -41,7 +41,7 @@
     "lib/"
   ],
   "engines": {
-    "node": "^14.17.0 || ^16.13.0 || >=18.0.0"
+    "node": "^18.17.0 || >=20.5.0"
   },
   "templateOSS": {
     "//@npmcli/template-oss": "This file is partially managed by @npmcli/template-oss. Edits may be overwritten.",