Update package.json

Author: SilanHe

package.json

@@ -28,6 +28,7 @@
   "bugs": {
     "url": "https://github.com/aws/lambda-durable-functions-js/issues"
   },
+  "private": true,
   "homepage": "https://github.com/aws/lambda-durable-functions-js/blob/test-hsilan/README.md",
   "devDependencies": {
     "@eslint/compat": "^1.3.0",