tsconfig.json

{
  "compilerOptions": {
    "target": "es6",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
    "strict": true,                                      /* Enable all strict type-checking options. */
    "skipLibCheck": true,                                 /* Skip type checking all .d.ts files. */
    "declaration": true,
    "rootDirs": [
      "src"
    ],
    "outDir": "build",
    "baseUrl": "src",
    "types": ["node", "jest", "mocha", "@testing-library/jest-dom"]
  },
  "include": [
    "src/index.ts",
    "test/unit/*",
    "test/integration/*",
    "test/e2e/*"
  ],
  "exclude": [
    "node_modules",
    "build"
  ]
}