{
  "files": [
      "typings-test.ts"
  ],
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "noEmit": true
  }
}

{
  "files": [
      "typings-test.ts"
  ],
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "lib": [
      "es6"
    ],
    "noEmit": true
  }
}

Use es6 in typings test
Use es6 in typings test
