message: chore: revert demo tns-ios version
diff: "nativescript": {
  "id": "org.nativescript.nestedroutertabview",
  "tns-ios": {
  - "version": "6.0.0-2019-05-16-165318-01"
  + "version": "next"
  },
  "tns-android": {
  "version": "next"
  