Update dependency svelte-loader to v3.1.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
svelte-loader	3.1.8 -> 3.1.9

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Release Notes

sveltejs/svelte-loader (svelte-loader)

### [`v3.1.9`](https://togithub.com/sveltejs/svelte-loader/blob/HEAD/CHANGELOG.md#319) [Compare Source](https://togithub.com/sveltejs/svelte-loader/compare/v3.1.8...c52f8df661a72fa20c801385861534e8cc03585a) - Handle `emitCSS` to `css` option transformation correctly for Svelte 4

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Configuration

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