Update travis: xcode version to 9.4

e-marchand · e-marchand · commit a5eb1dfc903d · 2018-07-19T11:24:13.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode9
+osx_image: xcode9.4
 env:
   global:
     - LC_CTYPE=en_US.UTF-8
