Bump vite-plugin-dts from 4.1.0 to 4.2.1 (#779)

Bumps [vite-plugin-dts](https://github.com/qmhc/vite-plugin-dts) from 4.1.0 to 4.2.1.
- [Release notes](https://github.com/qmhc/vite-plugin-dts/releases)
- [Changelog](https://github.com/qmhc/vite-plugin-dts/blob/main/CHANGELOG.md)
- [Commits](qmhc/vite-plugin-dts@v4.1.0...v4.2.1)

---
updated-dependencies:
- dependency-name: vite-plugin-dts
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>