sp-dev-fx-webparts/samples/react-upgrade-me/.yo-rc.json

{
  "@microsoft/generator-sharepoint": {
    "version": "1.4.0",
    "libraryName": "react-upgrade-me",
    "libraryId": "c32676e6-9536-4db1-b59f-62c7be23f38b",
    "environment": "onprem"
  }
}