CI: Updated version of macos image (#31292)

ShaharNaveh · jreback · commit a8c7bcc26818 · 2020-01-25T10:37:59.000-05:00
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
@@ -4,7 +4,7 @@ jobs:
 - template: ci/azure/posix.yml
   parameters:
     name: macOS
-    vmImage: xcode9-macos10.13
+    vmImage: macOS-10.14
 
 - template: ci/azure/posix.yml
   parameters:
