CI: Updated version of macos image

MomIsBestFriend · MomIsBestFriend · commit c1c727d6c4ac · 2020-01-24T20:43:29.000+02:00
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: macos10.15
 
 - template: ci/azure/posix.yml
   parameters:
