[Azure Pipelines] Add Xcode 10.2 job

azure-pipelines.yml

@@ -3,7 +3,7 @@ trigger:
 jobs:
 - job: macOS
   pool:
-    vmImage: 'macOS-10.13'
+    vmImage: $[ coalesce(variables['VM_IMAGE'], 'macOS-10.13') ] 
   strategy:
     maxParallel: 10
     matrix:
@@ -23,6 +23,10 @@ jobs:
       Xcode 10.1:
         DEVELOPER_DIR: '/Applications/Xcode_10.1.app'
         XCODE_FLAGS_FOR_TEST: -parallel-testing-enabled NO
+      Xcode 10.2:
+        DEVELOPER_DIR: '/Applications/Xcode_10.2.app'
+        VM_IMAGE: 'macOS-10.14'
+        XCODE_FLAGS_FOR_TEST: -parallel-testing-enabled NO
   steps:
     - script: |
         xcodebuild -version