Why no ES6 code conventions for this repo

Why haven't you used ES6 features like classes, let, imports for this repository. Since it being a converter to ES6, it would be better for it to follow ES6 conventions

@vivinjoy That's definitely something on the list but I don't have the time to do it due to work. Please check out http://xto6.js.org/ or https://github.com/5to6/5to6-codemod

Thanks!