message: move driver download from postinstall to build
diff: "license": "Apache-2.0",
  "scripts": {
  "start": "electron src/main/index.js",
  - "build": "electron-builder -c.electronVersion $(node -e \"console.log(require('electron/package.json').version)\") --publish never",
  - "postinstall": "mkdir -p files && node scripts/download-driver.js"
  + "build": "yarn install-chromedriver && electron-builder -c.electronVersion $(node -e \"console.log(require('electron/package.json').version)\") --publish never",
  + "install-chromedriver": "mkdir -p files && node scripts/download-driver.js"
  },
  "main": "src/main/index.js",
  "repository": {
  