sp-dev-fx-webparts/samples/react-mobx/config/package-solution.json

{
  "solution": {
    "name": "react-mobx-spfx-webpart-client-side-solution",
    "id": "8c525624-9e7c-4ef2-a886-fa753cb294d2",
    "version": "1.0.0.0"
  },
  "paths": {
    "zippedPackage": "solution/react-mobx-spfx-webpart.spapp"
  }
}