Update dependency postcss to v8.5.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss (source)	8.4.31 -> 8.5.1

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Release Notes

postcss/postcss (postcss)

v8.5.1

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• Fixed backwards compatibility for complex cases (by @​romainmenke).

v8.5.0

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v8.4.49

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• Fixed custom syntax without source.offset (by @​romainmenke).

v8.4.48

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• Fixed position calculation in error/warnings methods (by @​romainmenke).

v8.4.47

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• Removed debug code.

v8.4.46

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• Fixed Cannot read properties of undefined (reading 'before').

v8.4.45

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• Removed unnecessary fix which could lead to infinite loop.

v8.4.44

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• Another way to fix markClean is not a function error.

v8.4.43

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• Fixed markClean is not a function error.

v8.4.42

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• Fixed CSS syntax error on long minified files (by @​varpstar).

v8.4.41

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• Fixed types (by @​nex3 and @​querkmachine).
• Cleaned up RegExps (by @​bluwy).

v8.4.40

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• Moved to getter/setter in nodes types to help Sass team (by @​nex3).

v8.4.39

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• Fixed CssSyntaxError types (by @​romainmenke).

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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