Apply suggestions from code review

Co-authored-by: Andrew Branch <andrewbranch@users.noreply.github.com>

Author: jablko

packages/deprecate/package.json

@@ -16,5 +16,6 @@
   },
   "devDependencies": {
     "@types/libnpmsearch": "^2.0.3"
-  }
+  },
+  "private": true
 }