Update azure-pipelines.yml for Azure Pipelines

Author: licanhua

azure-pipelines.yml

@@ -21,4 +21,29 @@ steps:
 - task: CmdLine@2
   displayName: yarn run prepublishOnly
   inputs:
-    script: yarn run prepublishOnly
+    script: yarn run prepublishOnly
+
+- task: CmdLine@2
+  inputs:
+    script: |
+      npm pack
+
+- task: CopyFiles@2
+  inputs:
+    sourceFolder: '$(Build.SourcesDirectory)'
+    contents: '*.tgz' 
+    targetFolder: $(Build.ArtifactStagingDirectory)/npm
+  displayName: 'Copy npm package'
+
+- task: CopyFiles@2
+  inputs:
+    sourceFolder: '$(Build.SourcesDirectory)'
+    contents: 'package.json' 
+    targetFolder: $(Build.ArtifactStagingDirectory)/npm
+  displayName: 'Copy package.json'
+
+- task: PublishBuildArtifacts@1
+  inputs:
+    pathtoPublish: '$(Build.ArtifactStagingDirectory)/npm'
+    artifactName: npm
+  displayName: 'Publish npm artifact'