.travis.yml in mini_racer-0.1.4 vs .travis.yml in mini_racer-0.1.5.pre.0

@@ -6,10 +6,10 @@
   - 2.3.1
 matrix:
   include:
     - rvm: 2.2
       os: osx
-      osx_image: xcode7.3
+      osx_image: xcode8
 dist: trusty
 sudo: true
 before_install:
   - gem install bundler -v 1.12.0
 cache: bundler