message: Use TypeScript in index page
diff: },
  "dependencies": {
  "@docusaurus/core": "2.0.0-beta.13",
  + "@docusaurus/module-type-aliases": "^2.0.0-beta.14",
  "@docusaurus/preset-classic": "2.0.0-beta.13",
  "@docusaurus/theme-search-algolia": "2.0.0-beta.13",
  "@tsconfig/docusaurus": "~1.0.4",
  