chore(deps-dev): bump svelte-preprocess from 5.1.3 to 6.0.3

Bumps [svelte-preprocess](https://github.com/sveltejs/svelte-preprocess) from 5.1.3 to 6.0.3.
- [Changelog](https://github.com/sveltejs/svelte-preprocess/blob/main/CHANGELOG.md)
- [Commits](sveltejs/svelte-preprocess@v5.1.3...v6.0.3)

---
updated-dependencies:
- dependency-name: svelte-preprocess
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -43,7 +43,7 @@
     "rollup-plugin-svelte": "^7.1.0",
     "rollup-plugin-typescript2": "^0.35.0",
     "svelte": "^4.2.7",
-    "svelte-preprocess": "^5.1.3",
+    "svelte-preprocess": "^6.0.3",
     "tslib": "^2.4.1",
     "typescript": "^5.1.3",
     "vitest": "^2.0.2",