Module Exports issue on the index.js

This code from the index.js
```javascript
module.exports = {
  regions: require('./regions'),
  provinces: require('./provinces'),
  cities: require('./cities')
};
```
The above code should be change to:
```javascript
module.exports = {
  regions: require('./regions.json'),
  provinces: require('./provinces.json'),
  cities: require('./cities.json')
};
```

Thanks!