Bump macOS version in Travis

ahornace · ahornace · commit 629ebb4732f2 · 2018-08-03T06:09:14.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -10,7 +10,7 @@ matrix:
       sudo: required
       jdk: oraclejdk8
     - os: osx
-      osx_image: xcode8.3
+      osx_image: xcode9.4
 before_install: dev/before_install
 install: true
 before_script: dev/before
