Updated Travis CI Config

.travis.yml

@@ -1,3 +1,7 @@
 language: objective-c
+osx_image: xcode7
 xcode_project: Framework/YYModel.xcodeproj
-xcode_scheme: YYModel
+xcode_scheme: YYModel
+
+script:
+- xctool -project Framework/YYModel.xcodeproj -scheme YYModel build test CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO