fix(deps): update dependency cssnano to ^7.1.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
cssnano	^7.1.4 → ^7.1.9

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Release Notes

cssnano/cssnano (cssnano)

v7.1.9: v7.1.9

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Bug Fixes

• Reject :is() fold for unknown pseudo-classes with arguments by @​dkryaklin in #​1791

Full Changelog: https://github.com/cssnano/cssnano/compare/cssnano@7.1.8...cssnano@7.1.9

v7.1.8: v7.1.8

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What's Changed

• fix(postcss-minify-selectors): reject :is() fold for :nth-child(... of S) to preserve cascade by @​dkryaklin in #​1785
• Update postcss and @​colordx/core by @​ludofischer in #​1786

Full Changelog: https://github.com/cssnano/cssnano/compare/cssnano@7.1.7...cssnano@7.1.8

v7.1.7: v.7.1.7

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This release is idnetical to the previous one, but is being published to ensure that the latest versions of postcss-normalize-repeat-style and postcss-normalize-positions are uploaded to the npm registry.

v7.1.6: v7.1.6

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New feature

• feat(postcss-minify-selectors): fold selector lists into :is() (#​1703) by @​dkryaklin in #​1775

Bug fixes

• fix: update colordx and autoprefixer
• fix: update postcss peer dependency by @​ludofischer in #​1779 Solves possible security issue

Full Changelog: https://github.com/cssnano/cssnano/compare/cssnano@7.1.5...cssnano@7.1.6

v7.1.5: v7.1.5

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Bug Fixes

• fix(postcss-reduce-idents): support counter-set property by @​dkryaklin in #​1765
• fix(postcss-convert-values): add transformCustomProperties option by @​dkryaklin in #​1769
• fix(postcss-colormin): add transformCustomProperties option by @​dkryaklin in #​1768

Full Changelog: https://github.com/cssnano/cssnano/compare/cssnano@7.1.4...cssnano@7.1.5

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