chore(deps): update dependency postcss to v8.4.38

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss (source)	8.4.31 -> 8.4.38

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Release Notes

postcss/postcss (postcss)

v8.4.38

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• Fixed endIndex: 0 in errors and warnings (by @​romainmenke).

v8.4.37

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• Fixed original.column are not numbers error in another case.

v8.4.36

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• Fixed original.column are not numbers error on broken previous source map.

v8.4.35

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• Avoid ! in node.parent.nodes type.
• Allow to pass undefined to node adding method to simplify types.

v8.4.34

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• Fixed AtRule#nodes type (by Tim Weißenfels).
• Cleaned up code (by Dmitry Kirillov).

v8.4.33

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• Fixed NoWorkResult behavior difference with normal mode (by Romain Menke).
• Fixed NoWorkResult usage conditions (by @​ahmdammarr).

v8.4.32

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• Fixed postcss().process() types (by Andrew Ferreira).

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