Travis on MacOS: bump image version

diff --git a/.travis.yml b/.travis.yml
index 4ba4e2a..de16419 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ env:
 matrix:
   include:
     - os: osx
-      osx_image: xcode10.1
+      osx_image: xcode11.2
       compiler: clang
       env:
         - CXX=clang++