message: Remove single run from npm test
diff: "build": "webpack -p",
  "build:dev": "webpack -w",
  "build:demo": "webpack --config demo/webpack.config.js -w -d",
  - "test": "karma start --single-run",
  + "test": "karma start",
  "start": "npm run build:demo & live-server demo"
  },
  "keywords": [
  