Bump version to PATCH release 2.4.1
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

actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs