Update dependency browserslist to v4.20.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
browserslist	4.20.3 -> 4.20.4

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Release Notes

browserslist/browserslist

### [`v4.20.4`](https://togithub.com/browserslist/browserslist/blob/HEAD/CHANGELOG.md#​4204) [Compare Source](https://togithub.com/browserslist/browserslist/compare/4.20.3...4.20.4) - Fix Opera in `mobileToDesktop` (by Pig Fang).

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