message: added prepublish script
diff: "build-prod": "rm -rf build && env NODE_ENV=production yarn build",
  "build-chrome": "./build.sh build ../../selenium-ide.pem 1>/dev/null && mkdir -p dist && mv build.crx dist/selenium-ide.crx && echo \"Wrote dist/selenium-ide.crx\"",
  "build-firefox": "web-ext sign -s build -a dist --api-key=$AMO_JWT_ISSUER --api-secret=$AMO_JWT_SECRET --id=$(cat ../../.web-extension-id)",
  - "version": "node scripts/version.js"
  + "version": "node scripts/version.js",
  + "prepublishOnly": "yarn build-prod"
  },
  "devDependencies": {
  "autoprefixer": "^7.1.4",
  