Update leptos-use to 0.18.

New version, new release of demo pages.

Fix demo example page routing

Update to Leptos 0.8. Various fixes.

Match 0.2.2 release

Update leptos-use. Fix Leptos symbol collision by declaring `IntoInne…

…r as _`

Match 0.2.1 release

Leptos 0.7. #[non_exhaustive] on most of the API. Sealed Tick trait.

See CHANGELOG.md for details.

Matches 0.2.0 release

Proper alignment for cards on the examples page