Update .travis.yml

Author: PeterStaev

.travis.yml

@@ -55,7 +55,9 @@ matrix:
 
     - stage: "WebPack"
       os: osx
-      env:
+      env: 
+        - iOS="10.3"
+        - Xcode="8.3"
         - Platform="iOS"
       osx_image: xcode8.3
       language: node_js 
@@ -67,9 +69,10 @@ matrix:
     - language: android
       os: linux
       env:
+        - Android="25"
         - Platform="Android"
       jdk: oraclejdk8
       before_install: nvm install 6.10.3
       script: 
         - cd demo && npm install && npm run ns-bundle --android --build-app --uglify && cd ..
-        - cd demo-ng && npm install && npm run ns-bundle --android --build-app --uglify && cd ..
+        - cd demo-ng && npm install && npm run ns-bundle --android --build-app --uglify && cd ..