tsconfig.json

{
  "compilerOptions": {
    "target": "es6",
    /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
    "module": "CommonJS",
    /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
    "sourceMap": true,
    /* Generates corresponding '.map' file. */
    "inlineSources": true,
    /* Generates corresponding '.map' file. */
    "outDir": "./build",
    /* Redirect output structure to the directory. */
    "isolatedModules": true,
    /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
    "strict": true,
    /* Enable all strict type-checking options. */
    "moduleResolution": "node",
    /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    "esModuleInterop": true,
    /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "experimentalDecorators": true,
    /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true,
    /* Enables experimental support for emitting type metadata for decorators. */
    "skipLibCheck": true,
    /* Skip type checking of declaration files. */
    "forceConsistentCasingInFileNames": true
    /* Disallow inconsistently-cased references to the same file. */
  },
  "include": [
    "src/main.ts",
    "src/cli.ts"
  ],
  "exclude": [
    "node_modules",
    "**/*.spec.ts"
  ]
}