Use Xcode 7.2 for Travis-CI.

Author: nlutsenko

.travis.yml

@@ -3,7 +3,7 @@ branches:
     - master
 language: objective-c
 os: osx
-osx_image: xcode7.1
+osx_image: xcode7.2
 env:
   global:
     - LC_CTYPE=en_US.UTF-8
@@ -26,7 +26,7 @@ install:
 script:
 - bundle exec rake test:$TEST_TYPE
 after_success:
-- | 
+- |
   if [ "$TEST_TYPE" = "ios" ] || [ "$TEST_TYPE" = "osx" ]; then
     bash <(curl -s https://codecov.io/bash)
   fi