Update dependency rollup to v2.42.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	2.42.3 -> 2.42.4

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Release Notes

rollup/rollup

### [`v2.42.4`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2424) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.42.3...v2.42.4) _2021-03-24_ ##### Bug Fixes - Do not discard plugin return values when using perf option ([#​4010](https://togithub.com/rollup/rollup/issues/4010)) ##### Pull Requests - [#​4010](https://togithub.com/rollup/rollup/pull/4010): Return hook result inside promise with async timer end ([@​SuperOleg39](https://togithub.com/SuperOleg39))

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