Travis: use newer Xcode image

diff --git a/.travis.yml b/.travis.yml
index e93f2c8..0ffd5f7 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ compiler:
   - gcc
   - clang
 language: c
+osx_image: xcode10.1
 before_install:
   # When building the coverity_scan branch, allow only the first job to continue to avoid travis-ci/travis-ci#1975.
   - if [[ "${TRAVIS_BRANCH}" == "coverity_scan" && ! "${TRAVIS_JOB_NUMBER}" =~ \.1$ ]]; then exit 0; fi