fix(deps): update dependency cssnano to ^7.0.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cssnano	^7.0.5 -> ^7.0.6

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Release Notes

cssnano/cssnano (cssnano)

### [`v7.0.6`](https://redirect.github.com/cssnano/cssnano/releases/tag/cssnano%407.0.6): v7.0.6 [Compare Source](https://redirect.github.com/cssnano/cssnano/compare/cssnano@7.0.5...cssnano@7.0.6) #### What's Changed - Update postcss-calc and selector-parser by [@​ludofischer](https://redirect.github.com/ludofischer) in [https://github.com/cssnano/cssnano/pull/1663](https://redirect.github.com/cssnano/cssnano/pull/1663) - fix(postcss-convert-values): convert `0ms` to `0s` by [@​btea](https://redirect.github.com/btea) in [https://github.com/cssnano/cssnano/pull/1665](https://redirect.github.com/cssnano/cssnano/pull/1665) **Full Changelog**: https://github.com/cssnano/cssnano/compare/cssnano@7.0.5...cssnano@7.0.6

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