Update .travis.yml to use xcode7.3 for osx_image

mattprowse · mattprowse · commit 7ec7b806e6d9 · 2016-03-30T10:49:39.000+11:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode7.2
+osx_image: xcode7.3
 xcode_workspace: ReactiveTask.xcworkspace
 xcode_scheme: ReactiveTask
 script: script/cibuild
