Updated Travis CI Config

.travis.yml

@@ -1,4 +1,7 @@
 language: objective-c
+osx_image: xcode7
 xcode_project: Framework/YYCache.xcodeproj
 xcode_scheme: YYCache
-osx_image: xcode7.1
+
+script:
+- xctool -project Framework/YYCache.xcodeproj -scheme YYCache build test CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO