fix: compile svelte.xxx.js/ts files in Svelte 5

sveltejs/svelte#11536

core: Svelte 5 work

- use Svelte 4 in repository for testing now
- get tests passing using Svelte 5
- Silence Svelte 5 version of unused CSS warning code if `emitCss` is `false`

chore: release 7.2.0

version 7.1.4

version 7.1.3

version 7.1.2

version 7.1.1

version 7.1.0

7.0.0

version 6.1.1