chore: remove explicit engines.node from package.json

In the next publish, an explicit engines.node version may conflict with how users consume the package (especially if they do not use SvelteKit).

Author: metonym

package.json

@@ -55,8 +55,5 @@
     "code",
     "syntax",
     "typescript"
-  ],
-  "engines": {
-    "node": ">=16.7"
-  }
+  ]
 }