Bump version to PATCH release 2.4.1

Release Notes:
* Only set conv.data and user storage when changed
* Add TypeScript autocomplete for default Dialogflow intents
* Fix jsdoc for BrowseCarousel url
* Make simulator detection more strict
* Add a better error message when a simple response is required
* Fix simulator response for Dialogflow v1

Change-Id: I79f93cc7f7248a97f4f96905b17ad93b8c8399a7

package.json

@@ -3,7 +3,7 @@
   "description": "Actions on Google Client Library for Node.js",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {