tsconfig.json

{
  "compilerOptions": {
    /* Visit https://aka.ms/tsconfig to read more about this file */

    /* Language and Environment */
    "target": "ES5",

    /* Specify a set of bundled library declaration files that describe the target environment. */
    "lib": ["ESNext"],

    /* Specify what module code is generated. */
    "module": "CommonJS",

    /* Specify how TypeScript looks up a file from a given module specifier. */
    "moduleResolution": "Node",

    /* Specify the root folder within your source files. */
    "rootDir": ".",

    /* Specify an output folder for all emitted files. */
    "outDir": "./dist",

    /* Create source map files for emitted JavaScript files. */
    // "sourceMap": true,

    /* Enable importing .json files. */
    "resolveJsonModule": true,

    /* Emit additional JavaScript to ease support for importing CommonJS modules. */
    "esModuleInterop": true,

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

    /* Skip type checking all .d.ts files. */
    "skipLibCheck": true
  },
  "exclude": ["node_modules", "jest.config.ts", "./tests/**/*.spec.ts"]
}