build(deps-dev): bump rollup from 2.26.5 to 2.26.6 (#286)

Bumps [rollup](https://github.com/rollup/rollup) from 2.26.5 to 2.26.6.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.26.5...v2.26.6)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>