tsconfig.json

{
    "compilerOptions": {
      "target": "es6",
      "module": "commonjs",
      "outDir": "./lib",
      "rootDir": "./src",
      "strict": true,
      "noImplicitAny": false,
      "moduleResolution": "node",
      "allowSyntheticDefaultImports": true,
      "esModuleInterop": true,
      "declaration": false,
      "sourceMap": true,
      "lib": ["es6"]
    },
    "exclude": ["node_modules", "**/*.test.ts"]
  }