Update dependency svelte to v3.49.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
svelte (source)	3.48.0 -> 3.49.0

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Release Notes

sveltejs/svelte

### [`v3.49.0`](https://togithub.com/sveltejs/svelte/blob/HEAD/CHANGELOG.md#​3490) [Compare Source](https://togithub.com/sveltejs/svelte/compare/v3.48.0...v3.49.0) - Improve performance of string escaping during SSR ([#​5701](https://togithub.com/sveltejs/svelte/pull/5701)) - Add `ComponentType` and `ComponentProps` convenience types ([#​6770](https://togithub.com/sveltejs/svelte/pull/6770)) - Add support for CSS `@layer` ([#​7504](https://togithub.com/sveltejs/svelte/issues/7504)) - Export `CompileOptions` from `svelte/compiler` ([#​7658](https://togithub.com/sveltejs/svelte/pull/7658)) - Fix DOM-less components not being properly destroyed ([#​7488](https://togithub.com/sveltejs/svelte/issues/7488)) - Fix `class:` directive updates with `` ([#​7521](https://togithub.com/sveltejs/svelte/issues/7521), [#​7571](https://togithub.com/sveltejs/svelte/issues/7571)) - Harden attribute escaping during SSR ([#​7530](https://togithub.com/sveltejs/svelte/pull/7530))

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