jsfiddle/package.json

{
  "dependencies": {
    "@webcomponents/custom-elements": "~1.2.0",
    "common-sk": "~3.1.0",
    "elements-sk": "~2.5.0",
    "lit-html": "~0.12.0"
  },
  "devDependencies": {
    "copy-webpack-plugin": "~4.5.2",
    "pulito": "^4.1.0",
    "webpack": "^4.20.2",
    "webpack-cli": "^3.1.1"
  }
}