For package.json

package.json

"dependencies": {
    "chokidar": "^1.7.0",
    "chokidar-cli": "^1.2.0",
    "cssnano": "^3.10.0",
    "perfectionist": "^2.4.0",
    "postcss-advanced-variables": "^1.2.2",
    "postcss-cli": "^4.1.0",
    "postcss-cssnext": "^3.0.0",
    "postcss-mixins": "^6.0.1",
    "postcss-nested": "^2.0.2",
    "stylefmt": "^6.0.0",
    "throttleit": "^1.0.0"
  },
  "devDependencies": {
    "backstopjs": "^2.7.5",
    "browser-sync": "^2.18.12",
    "eslint": "^4.2.0",
    "eslint-config-inpsyde": "^1.4.0",
    "eslint-config-standard": "^10.2.1",
    "eslint-plugin-promise": "^3.4.0",
    "eslint-plugin-standard": "^3.0.1",
    "mdcss": "^1.5.2",
    "mdcss-theme-github": "^2.4.2",
    "postcss-import": "^10.0.0"
  },
  "browserslist": [
    "last 4 versions",
    "ie >= 10"
  ],
  "scripts": {
    "styleguide": "postcss -c npm-scripts/postcss-styleguide-conf.json",
    "browser-sync": "npm-scripts/browser-sync.js",
    "csssort": "cssdeclsort src/css/style4.css",
    "postcss-print": "postcss -c npm-scripts/postcss-print-conf.json",
    "print": "npm run csssort & npm run postcss-print",
    "postcss2": "postcss  src/css/style4.css -c npm-scripts/postcss.config.js -o build/css/style4.css -w",
    "postcss": "postcss  src/css/style4.css -c npm-scripts/postcss.config.js -o build/css/style4.css",
    "chokidar": "chokidar '**/src/css/style4.css' -c 'yarn run postcss' --silent",
    "watch": "yarn run csssort & yarn run chokidar & yarn run browser-sync"
  }