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

[renovate]

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

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[baseballyama]

postcss-safe-parser requires Node 18.