update travis.yml with latest OS X 10.13 image

tofi86 · tofi86 · commit 9ffe571873a8 · 2018-04-11T23:50:18.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -15,7 +15,7 @@ matrix:
       osx_image: xcode9
     # OS X 10.13
     - os: osx
-      osx_image: xcode9.3beta
+      osx_image: xcode9.3
 
 
 # run the 'java-version-tester' script and show&save (`tee`) the output to a
