support for React 19

I tried installing unpic/react in a new Next.js 15.1 project with React 19 and received the following peer dependency error: 

```console
npm error Could not resolve dependency:
npm error peer react@"^17.0.0 || ^18.0.0" from @unpic/react@0.1.15
```

Is the unpic team working on support for React 19?