Update to XCode 10 to start prepping for notarization

pimterry · pimterry · commit d8c55a6b42fa · 2019-08-01T17:14:46.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -10,7 +10,7 @@ os:
 - linux
 - osx
 
-osx_image: xcode8.3
+osx_image: xcode10
 
 addons:
   apt:
