chore(deps): update dependency postcss-nested to v5

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-nested	2.1.2 -> 5.0.6

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Release Notes

postcss/postcss-nested

v5.0.6

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• Fixed custom at-rules nesting (by @​bsak-shell).

v5.0.5

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• Fixed , at the tail (by Jesse de Boer).

v5.0.4

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• Fixed nested & at the tail (by Raphael Luba).
• Fixed docs (by Samuel Charpentier).

v5.0.3

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• Fixed compability with Autoprefixer by adding @-webkit-keyframes support.

v5.0.2

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• Fixed compatibility with postcss-mixins by moving to visitor API.

v5.0.1

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• Fixed PostCSS 8.1 compatibility.
• Added funding links.

v5.0.0

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v4.2.3

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• Fixed declarations after nested rule and before at-rule (by Rodion Demikhov).

v4.2.2

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• Fixed wrong specificity order of declarations (by Rodion Demikhov).

v4.2.1

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• Fix TypeScript definitions (by Avi Vahl).

v4.2.0

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v4.1.2

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• Improve error messsage on broken selector

v4.1.1

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• Add &(:hover) support (by Ben Delarre).

v4.1.0

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v4.0.0

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v3.0.0

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