{
  "compilerOptions": {
    "target": "es6",
    "module": "es6",
    "declaration": true,
    "moduleResolution": "node"
  }
}

{
  "compilerOptions": {
    "target": "es5",
    "module": "es6",
    "declaration": true,
    "moduleResolution": "node"
  }
}

Replace ES6 output with jsnext compatible code
Replace ES6 output with jsnext compatible code
