Bump rollup from 2.26.5 to 2.40.0 (#226)

Bumps [rollup](https://github.com/rollup/rollup) from 2.26.5 to 2.40.0.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.26.5...v2.40.0)

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