sp-dev-fx-webparts/tutorials/helloworld-webpart/config/package-solution.json

{
  "solution": {
    "name": "helloworld-webpart-client-side-solution",
    "id": "07e47f56-46a7-45ef-927c-210939ed441b",
    "version": "1.0.0.0"
  },
  "paths": {
    "zippedPackage": "solution/helloworld-webpart.sppkg"
  }
}