sp-dev-fx-webparts/samples/js-modern-calendar/config/package-solution.json

{
  "solution": {
    "name": "spFX Modern Calendar",
    "id": "3d593a2f-73f1-486f-9dae-555c6f6b584d",
    "version": "1.0.0.1"
  },
  "paths": {
    "zippedPackage": "solution/modern-calendar.sppkg"
  }
}