Svelte 5 support

[slokhorst]

When I try to update my project that uses svelte-gantt to Svelte 5, I get the following error:

npm ERR!
code ERESOLVE
ERESOLVE unable to resolve dependency tree

While resolving: myproject@0.0.1
Found: svelte@5.20.2
node_modules/svelte
  dev svelte@"^5.0.0" from the root project

Could not resolve dependency:
peer svelte@"^4.0.0" from svelte-gantt@4.5.0
node_modules/svelte-gantt
  dev svelte-gantt@"^4.5" from the root project

Fix the upstream dependency conflict, or retry
this command with --force or --legacy-peer-deps
to accept an incorrect (and potentially broken) dependency resolution.

It would be nice to be able to use svelte-gantt from Svelte 5 projects.

Is there already an attempt to support Svelte 5? Are PRs welcome?