Update osx_image in .travis.yml

hamchapman · hamchapman · commit 0533aa2fbaab · 2018-04-04T10:22:32.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode9
+osx_image: xcode9.3beta
 sudo: false
 env:
   - iOS= DST='platform=iOS Simulator,name=iPhone 6S' ACTION=test DEVICE='iPhone 6s (10.0)'
