Svelte 5 support

[lshqqytiger]

From Svelte 5, svelte/internal that egjs-conveyer imports no longer exists.

Error: Your application, or one of its dependencies, imported from 'svelte/internal', which was a private module used by Svelte 4 components that no longer exists in Svelte 5. It is not intended to be public API. If you're a library author and you used 'svelte/internal' deliberately, please raise an issue on https://github.com/sveltejs/svelte/issues detailing your use case.