BREAKING CHANGE:
- SSR has been rewritten from scratch, if you use it, please follow the
new guide.
- Prefetch component and prefetch functions have been removed, please
use `webpackPrefetch` instead.
BREAKING CHANGE:
- `ErrorComponent` is ignored, please use Error Boundaries to handle errors.
- `lazy` is no longer exported
- `LoadingComponent` is replaced by `fallback` option
- `ref` are now forwarded