chore(deps-dev): bump @sveltejs/kit from 1.0.0-next.247 to 1.0.0-next.260 (#631)

* chore(deps-dev): bump @sveltejs/kit

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 1.0.0-next.247 to 1.0.0-next.260.
- [Release notes](https://github.com/sveltejs/kit/releases)
- [Changelog](https://github.com/sveltejs/kit/blob/master/packages/kit/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/kit/commits/@sveltejs/kit@1.0.0-next.260/packages/kit)

---
updated-dependencies:
- dependency-name: "@sveltejs/kit"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

* Update svelte.config.js

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matthieu MOREL <mmorel-35@users.noreply.github.com>

svelte.config.js

@@ -19,8 +19,6 @@ const config = {
 					base: `/mermaid-live-editor${process.env['BETA'] ? '/beta' : ''}`
 			  }
 			: {},
-		// hydrate the <div id="svelte"> element in src/app.html
-		target: '#svelte',
 		trailingSlash: 'ignore',
 		vite: {
 			envPrefix: 'MERMAID_',