title: how to call PowerShell script with a GithubActions workflow?
body: <p>I'm calling <code>.\build.ps1</code> and it seems to hang:</p>
  
  <p><a href="https://github.com/nblockchain/ZXing.Net.Xamarin/runs/232358091" rel="noreferrer">https://github.com/nblockchain/ZXing.Net.Xamarin/runs/232358091</a></p>
  
  <p>Do I need something special? In AzureDevOps this was working out of the box.</p>