Add missing test scripts

Author: jdnichollsc

.travis.yml

@@ -50,13 +50,13 @@ matrix:
         - android-wait-for-emulator
       before_install:
         - nvm install 10
-      script: cd src && npm run demo.android
+      script: travis_wait travis_retry cd src && npm run test.android
     - os: osx
       language: node_js
       node_js: "10"
       jdk: oraclejdk8
       osx_image: xcode11.2
-      script: cd src && npm run demo.ios
+      script: travis_wait travis_retry cd src && npm run test.ios
 
 android:
   components:

src/package.json

@@ -18,6 +18,8 @@
 		"tsc": "npm i && tsc",
 		"build": "npm run tsc && npm run build.native",
 		"build.native": "node scripts/build-native.js",
+		"test.android": "npm i && npm run tsc && npm run tslint && cd ../demo && tns build android && tns test android --justlaunch",
+		"test.ios": "npm i && npm run tsc && npm run tslint && cd ../demo && tns build ios && tns test ios --justlaunch",
 		"tslint": "cd .. && tslint \"**/*.ts\" --config tslint.json --exclude \"**/node_modules/**\"",
 		"ci.tslint": "npm i && tslint '**/*.ts' --config '../tslint.json' --exclude '**/node_modules/**' --exclude '**/platforms/**'",
 		"prepack": "npm run build.native",