fix(deps): update dependency postcss to v8.4.42 in package.json

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	OpenSSF
postcss (source)	dependencies	patch	8.4.41 -> 8.4.42

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Release Notes

postcss/postcss (postcss)

### [`v8.4.42`](https://togithub.com/postcss/postcss/blob/HEAD/CHANGELOG.md#8442) [Compare Source](https://togithub.com/postcss/postcss/compare/8.4.41...8.4.42) - Fixed CSS syntax error on long minified files (by [@​varpstar](https://togithub.com/varpstar)).

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