message: fix: clear deprecation for --prod flag
diff: ],
  "scripts": {
  "build": "npm run build:lib && npm run build:demo",
  - "build:demo": "ng build ng-chartist-demo --prod",
  + "build:demo": "ng build ng-chartist-demo --configuration production",
  "build:lib": "copyfiles package.json README.md projects/ng-chartist && ng build ng-chartist",
  "e2e": "ng e2e",
  "gh-pages": "git checkout gh-pages && git merge master && npm run build && npm run doc && mv dist/ng-chartist-demo demo",
  