fix(deps): update dependency postcss-safe-parser to v7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-safe-parser	^6.0.0 -> ^7.0.0

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Release Notes

postcss/postcss-safe-parser (postcss-safe-parser)

### [`v7.0.0`](https://togithub.com/postcss/postcss-safe-parser/compare/6.0.0...7.0.0) [Compare Source](https://togithub.com/postcss/postcss-safe-parser/compare/6.0.0...7.0.0)

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Latest commit: 27b4dae90d6dd1a8c352be7d7883166aeb457a35

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