Bump rollup-plugin-dts from 6.3.0 to 6.4.0

Bumps [rollup-plugin-dts](https://github.com/Swatinem/rollup-plugin-dts) from 6.3.0 to 6.4.0.
- [Changelog](https://github.com/Swatinem/rollup-plugin-dts/blob/master/CHANGELOG.md)
- [Commits](Swatinem/rollup-plugin-dts@v6.3.0...v6.4.0)

---
updated-dependencies:
- dependency-name: rollup-plugin-dts
  dependency-version: 6.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]