tsconfig.json

{
  "compilerOptions": {
    "target": "es2015" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
    "module": "es2020" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
    "strict": true /* Enable all strict type-checking options. */,
    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */,
    "outDir": "./lib",
    "declaration": true,
    "moduleResolution": "node",
    "resolveJsonModule": true
  },
  "ts-node": {
    // these options are overrides used only by ts-node
    "compilerOptions": {
      "module": "commonjs"
    }
  },
  "include": ["./src/**/*"],
  "exclude": ["src/__test__", "src/scripts"]
}