sp-dev-fx-webparts/samples/js-extend-gulp/config/package-solution.json

{
  "solution": {
    "name": "js-extend-gulp-client-side-solution",
    "id": "ff250e08-bd51-498e-8b3f-a296db4f0c2c",
    "version": "1.0.0.0"
  },
  "paths": {
    "zippedPackage": "solution/js-extend-gulp.sppkg"
  }
}