rails--rails/actionmailbox/test/dummy/package.json

{
  "name": "dummy",
  "private": true,
  "dependencies": {
    "@rails/webpacker": "^4.0.2",
    "activetext": "file:../.."
  },
  "devDependencies": {
    "webpack-dev-server": "^3.2.1"
  }
}