tsconfig.json

{
  "compilerOptions": {
    "baseUrl": ".",
    "outDir": "./dist",
    "rootDir": "./src",
    "noImplicitReturns": false,
    "noImplicitAny": false,
    "noUnusedLocals": false,
    "noUnusedParameters": true,
    "incremental": true,
    "target": "esnext"
    /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
    "module": "esnext"
    /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
    "declaration": true
    /* Generates corresponding '.d.ts' file. */,
    "sourceMap": true
    /* Generates corresponding '.map' file. */,
    //"importHelpers": true /* Import emit helpers from 'tslib'. */,
    "lib": [
      "ES5",
      "ES6"
    ],
    /* Strict Type-Checking Options */
    // "strict": true /* Enable all strict type-checking options. */,
    "resolveJsonModule": true,
    "moduleResolution": "node",
    "esModuleInterop": true
  },
  "include": [
    "src"
  ],
  "exclude": [
    "./dist",
    "./node_modules",
    "src/__tests__"
  ]
}