Setup code coverage in Azure DevOps

Author: andyleejordan

.vsts-ci/templates/ci-general.yml

@@ -67,3 +67,9 @@ steps:
     testRunner: JUnit
     testResultsFiles: '**/test-results.xml'
   condition: succeededOrFailed()
+
+- task: PublishCodeCoverageResults@1
+  displayName: Publish code coverage results
+  inputs:
+    codeCoverageTool: Cobertura
+    summaryFileLocation: $(Build.SourcesDirectory)/vscode-powershell/coverage/cobertura-coverage.xml