Merge pull request #31 from ruiconti/master

Fix deprecated ubuntu version used for vmImage value

Use Ubuntu 18.04, which is still supported.

https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops&tabs=yaml

Author: Gelio

azure-pipelines.yml

@@ -1,5 +1,5 @@
 pool:
-  vmImage: 'Ubuntu-16.04'
+  vmImage: 'ubuntu-18.04'
 
 steps:
   - task: NodeTool@0