You can install and download this extension from the Visual Studio Marketplace
https://marketplace.visualstudio.com/items?itemName=WaelHamze.xrm-ci-framework-build-tasks
VSTS Extension for Dynamics 365 Customer Engagement
PowerShellGPL-3.0
You can install and download this extension from the Visual Studio Marketplace
https://marketplace.visualstudio.com/items?itemName=WaelHamze.xrm-ci-framework-build-tasks