[CI] Activate continuous integration for the “v4” branch

Clément Le Provost · Clément Le Provost · commit 4fef9207590b · 2016-09-09T20:51:04.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,7 @@
 branches:
   only:
     - master
+    - v4
 osx_image: xcode7.3
 language: objective-c
 env:
