travis: use newer builder image (ethereum#28475)

karalabe · web-flow · commit 97ae32441e48 · 2023-11-07T13:00:31.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -96,6 +96,7 @@ jobs:
     - stage: build
       if: type = push
       os: osx
+      osx_image: xcode14.2
       go: 1.21.x
       env:
         - azure-osx
