message: Use yarn for commands
diff: "vega-tooltip": "^0.18.1"
  },
  "scripts": {
  - "prebuild": "npm run clean && ./build-style.sh && tsc && cp package.json build/",
  + "prebuild": "yarn clean && ./build-style.sh && tsc && cp package.json build/",
  "build": "rollup -c",
  "quickbuild": "./build-style.sh && tsc && rollup -c",
  "clean": "rm -rf build && rm -f src/style.ts && mkdir build",
  "eslintbase": "eslint '{src,test}/**/*.ts'",
  "prettierbase": "prettier '*.scss' '*.html' '*.js'",
  - "format": "npm run eslintbase -- --fix && npm run prettierbase -- --write",
  - "lint": "npm run eslintbase && npm run prettierbase -- --check",
  + "format": "yarn eslintbase --fix && yarn prettierbase --write",
  + "lint": "yarn eslintbase && yarn prettierbase --check",
  "postbuild": "terser build/vega-embed.js -cm > build/vega-embed.min.js",
  - "prepublishOnly": "npm run build",
  - "preversion": "npm run lint && npm run test",
  + "prepublishOnly": "yarn build",
  + "preversion": "yarn lint && yarn test",
  "serve": "browser-sync start --directory -s -f build *.html",
  - "start": "npm run build && concurrently --kill-others -n Server,Typescript,Rollup 'npm run serve' 'tsc -w' 'rollup -c -w'",
  + "start": "yarn build && concurrently --kill-others -n Server,Typescript,Rollup 'yarn serve' 'tsc -w' 'rollup -c -w'",
  "pretest": "./build-style.sh",
  "test": "jest",
  "test:inspect": "node --inspect-brk ./node_modules/.bin/jest --runInBand"
  