Update to Node 10

[PierreYvesR]

Description

WIP - not ready

Update to Node 10 from Node 6, as Node 6 runner will be deprecated on Azure DevOps by the end of March 2022. The typescript compiler has been update to version 4.0.2. Replaced vsts-task-lib and vs-task-tool-lib with azure-pipelines-task-lib and azure-pipelines-tool-lib

ref: [https://github.com/microsoft/azure-pipelines-tasks/blob/master/docs/migrateNode10.md](Upgrading Tasks to Node 10)

• fixes #41

TODO

• test it (it builds, but I haven't tested it!)