tsconfig.json

{
  "compilerOptions": {
    /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
    "target": "esnext",
    /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "module": "commonjs",
    "allowJs": true,
    "checkJs": false,
    /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "allowSyntheticDefaultImports": true,
    /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "esModuleInterop": true,
    "jsx": "preserve",
    "noUnusedLocals": true,
    "strict": true,
    "resolveJsonModule": true,
    "rootDir": "./src",
    "outDir": "./lib"
  },
  "include": [
    "src/**/*"
  ]
}