[Travis] Use Xcode 8.1 image

ikesyo · sharplet · commit b9b6e60779cf · 2016-11-16T07:45:04.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode8
+osx_image: xcode8.1
 before_install: true
 install: true
 git:
