message: chore: add dev command
diff: "vuepress-plugin-sitemap": "^2.3.1"
  },
  "scripts": {
  + "dev": "tsc -p tsconfig.json --watch",
  "test": "run-s test:*",
  "test:lint": "eslint -c .eslintrc.js --ext .js,.ts .",
  "test:unit": "run-s build && ava",
  