fix(package.json): Improve description

Author: csuermann

package.json

@@ -2,7 +2,7 @@
   "name": "node-red-contrib-virtual-smart-home",
   "version": "4.0.0",
   "type": "commonjs",
-  "description": "A Node-RED node that represents a 'virtual device' which can be controlled via Alexa. Requires the virtual smart home skill to be enabled for your Amazon account.",
+  "description": "Do stuff in Node-RED with Amazon Alexa - no custom hardware, no separate accounts, no hassle.",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "prepack": "npm shrinkwrap && echo \"module.exports = '$npm_package_version'\" > version.js && echo \"$npm_package_version\" > ./icons/version.txt"