Bump @sveltejs/kit from 1.0.0-next.276 to 1.0.0-next.278

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 1.0.0-next.276 to 1.0.0-next.278.
- [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.278/packages/kit)

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

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Author: dependabot[bot]