tsconfig.json

{
  "compilerOptions": {

    /* Language and Environment */
    "target": "es5",                                     /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */

    /* Modules */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "moduleResolution": "node",                          /* Specify how TypeScript looks up a file from a given module specifier. */

    /* Emit */
    "declaration": false,                                /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
    "outDir": "./dist/cjs",                              /* Specify an output folder for all emitted files. */

    /* Interop Constraints */
    "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. */

    /* Type Checking */
    "strict": true,                                      /* Enable all strict type-checking options. */

    /* Completeness */
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  },
  "include": [
    "src"
  ],
  "exclude": [
    "src/**/__tests__/**"
  ]
}