usePosition

A simple hook to get position of a element

```
function App() {
  let ref = useRef(null);
  let { left, top } = usePosition(ref);
  return (
    <p ref={ref}>Hello Hooks: {JSON.stringify({left, top})}</p>
  );
}
```

here my repo: https://github.com/tranbathanhtung/usePosition