Make compatible with Svelte 5

[mhkeller]

This PR bumps up the versions in the library to make it more easily compatible with Svelte 5. It does not update the API to use runes, eliminate the use of stores or get rid of reactive statements.

[mhkeller]

@sveltejs/vite-plugin-svelte@3.1.0 has a peerDep mismatch that will be fixed once 5.0.0 is out. I may wait until 5.0.0 is out anyway.

[mhkeller]

Credit to @rgieseke for the help on this one so far

[rgieseke]

This will be outdated soon with new Svelte 'next' releases anyways, but I think the peer dependency needs to be >=5.0.0-next.123 as 121 was breaking Layer Cake.

For more reliable testing I also did a strict versioning "svelte": "5.0.0-next.123",. Might be better to add back the caret.

[rgieseke]

The <script lang="ts"> is also in layercake-template. Maybe it needs to be changed there as well?

https://github.com/mhkeller/layercake-template/blob/3c5bd9854b8bee50b9ee61efc9c7cb207545cceb/src/routes/%2Blayout.svelte#L1

39f3081

[mhkeller]

Good call. Fixed

[mhkeller]

This will be outdated soon with new Svelte 'next' releases anyways, but I think the peer dependency needs to be >=5.0.0-next.123 as 121 was breaking Layer Cake.

For more reliable testing I also did a strict versioning "svelte": "5.0.0-next.123",. Might be better to add back the caret.

Added this

[mhkeller]

i think this will be a patch version unless there's a good reason why it should be a minor version

[mhkeller]

I gotta say, the website now seems a ton faster!