Arrow functions are converted to traditional functions

Hi, I have the following component:

```js
console.log(e)}>Click me
```
But it is transformed to this instead:

```js

Click me

```

This cast is not only visually bad, it also changes the function behavior since an arrow function passes the *this* value from the context and not function. We might want to use "this" inside the callback function to alter the parent component state.

By the way, this library is very useful ! Thanks :+1: