message: Clear `dist` between builds
diff: "freezer": "webpack --config=./webpack_config/webpack.freezer.js && node ./dist/freezer.js",
  "freezer:validate": "npm run freezer -- --validate",
  "db": "nodemon ./db",
  - "build": "webpack --config webpack_config/webpack.prod.js",
  + "build": "rimraf dist && webpack --config webpack_config/webpack.prod.js",
  "prebuild": "check-node-version --package",
  - "build:downloadable": "BUILD_DOWNLOADABLE=true webpack --config webpack_config/webpack.prod.js",
  + "build:downloadable": "BUILD_DOWNLOADABLE=true rimraf dist && webpack --config webpack_config/webpack.prod.js",
  "prebuild:demo": "check-node-version --package",
  "test:coverage": "jest --config=jest_config/jest.config.json --coverage",
  "test": "jest --config=jest_config/jest.config.json",
  