Update dependency rollup to v3.20.7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	3.20.6 -> 3.20.7

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Release Notes

rollup/rollup

### [`v3.20.7`](https://togithub.com/rollup/rollup/blob/HEAD/CHANGELOG.md#​3207) [Compare Source](https://togithub.com/rollup/rollup/compare/v3.20.6...v3.20.7) *2023-04-21* ##### Bug Fixes - Properly track array element mutations when iterating with a for-of loop ([#​4949](https://togithub.com/rollup/rollup/issues/4949)) - Handle default exporting an anonymous class that extends another class ([#​4950](https://togithub.com/rollup/rollup/issues/4950)) ##### Pull Requests - [#​4943](https://togithub.com/rollup/rollup/pull/4943): Add a test for reserved keywords used as import/export specifiers ([@​Andarist](https://togithub.com/Andarist)) - [#​4949](https://togithub.com/rollup/rollup/pull/4949): Deoptimize right side in for-of loops ([@​lukastaegert](https://togithub.com/lukastaegert)) - [#​4950](https://togithub.com/rollup/rollup/pull/4950): Support default exported classes that extend other classes ([@​lukastaegert](https://togithub.com/lukastaegert))

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