ficdown.js/tsconfig.json

{
   "compilerOptions": {
      "target": "es5",
      "lib": ["es2017", "dom"],
      "module": "commonjs",
      "moduleResolution": "node",
      "baseUrl": "./src",
      "outDir": "./build/unpacked",
      "allowJs": true,
      "strict": true
   }
}