Use newer macOS test machine for Travis

diff --git a/.travis.yml b/.travis.yml
index 0d3f41940666d3f5548b4098a07f8f8bdf5150c3..20004d7976a5c119cff4ca6b32dde2b0e84b7bab 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ env:
   - TEST_BROWSER_NAME='internet explorer' TEST_BROWSER_OS='Windows 10'
   - TEST_BROWSER_NAME='internet explorer' TEST_BROWSER_OS='Windows 7'
   - TEST_BROWSER_NAME=microsoftedge TEST_BROWSER_OS='Windows 10'
-  - TEST_BROWSER_NAME=safari TEST_BROWSER_OS='OS X 10.11'
+  - TEST_BROWSER_NAME=safari TEST_BROWSER_OS='OS X 10.12'
 before_script: npm install -g karma-cli
 addons:
   sauce_connect: