chore: Fix CI build

Author: YvesCandel

.travis.yml

@@ -4,33 +4,33 @@ matrix:
       os: osx
       env:
         - WebPack="iOS"
-      osx_image: xcode9.2
+      osx_image: xcode10.0
       language: node_js
-      node_js: "6"
+      node_js: "8"
       jdk: oraclejdk8
       script: cd src && npm i && cd ../demo && npm i && tns build ios --bundle --env.uglify && cd ../demo-angular && npm i && tns build ios --bundle --env.uglify --env.aot
     - language: android
       os: linux
       env:
         - WebPack="Android"
       jdk: oraclejdk8
-      before_install: nvm install 6.10.3
+      before_install: nvm install 8
       script: cd src && npm i && cd ../demo && npm i && tns build android --bundle --env.uglify --env.snapshot && cd ../demo-angular && tns build android --bundle --env.uglify --env.snapshot --env.aot
     - language: android
       env:
-        - BuildAndroid="26"
+        - BuildAndroid="28"
       os: linux
       jdk: oraclejdk8
       before_install: nvm install stable
       script:
         - cd src && npm i && cd ../demo && tns build android && cd ../demo-angular && tns build android
     - os: osx
       env:
-        - BuildiOS="11"
-        - Xcode="9.2"
-      osx_image: xcode9.2
+        - BuildiOS="12"
+        - Xcode="10.0"
+      osx_image: xcode10.0
       language: node_js
-      node_js: "6"
+      node_js: "8"
       jdk: oraclejdk8
       script:
         - cd src && npm i && cd ../demo && tns build ios && cd ../demo-angular && tns build ios
@@ -39,10 +39,14 @@ android:
   components:
     - tools
     - platform-tools
-    - build-tools-27.0.3
-    - android-26
-    - android-23
+    - build-tools-28.0.3
+    - android-28
     - extra-android-m2repository
+    - sys-img-armeabi-v7a-android-21
+
+before_install:
+    - sudo pip install --upgrade pip
+    - sudo pip install six
 
 install:
     - echo no | npm install -g nativescript