bump package version number

we do this to be in sync with the version numbering of the app in play
store

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cnapp",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "private": true,
   "main": "node_modules/expo/AppEntry.js",
   "scripts": {