Allow pipeline to be cancelled via cancellationtoken

[sebastianslutzky]

Hi, I'm currently running multiple powershell tasks in parallel. I'd like to be able to stop them all if one of them fail. I am already cancelling the cancellationtoken but I'd need the PowershellRunner to listen to it and stop the running pipeline. The cancellationtoken can be passed via configuration....or maybe it is already available as a core functionality of Cake? thanks Sebastian