Update dependency postcss to v8.4.43

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss (source)	`8.4.42` -> `8.4.43`

Release Notes

postcss/postcss (postcss)

### [`v8.4.43`](https://togithub.com/postcss/postcss/blob/HEAD/CHANGELOG.md#8443) [Compare Source](https://togithub.com/postcss/postcss/compare/8.4.42...8.4.43) - Fixed `markClean is not a function` error.

Configuration

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iAverages / Yin

Update dependency postcss to v8.4.43 #1424

Release Notes

Configuration

Quality Gate passed