Update dependency postcss-selector-parser to ^6.0.13

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-selector-parser	^6.0.12 -> ^6.0.13
postcss-selector-parser	^6.0.12 -> ^6.0.13

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Release Notes

postcss/postcss-selector-parser (postcss-selector-parser)

### [`v6.0.13`](https://togithub.com/postcss/postcss-selector-parser/blob/HEAD/CHANGELOG.md#6013) [Compare Source](https://togithub.com/postcss/postcss-selector-parser/compare/v6.0.12...v6.0.13) - Fixed: throw on unexpected pipe symbols

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Configuration

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