Merge pull request #82 from mathworks/mac-agent

Use latest Mac image

Author: acampbel

azure-pipelines.yml

@@ -8,7 +8,7 @@ strategy:
     linux:
       imageName: 'ubuntu-16.04'
     mac:
-      imageName: 'macos-10.13'
+      imageName: 'macOS-10.15'
     windows:
       imageName: 'vs2017-win2016'