Update postcss-nested requirement from 4.1.0 to 4.1.2
Update postcss-nested requirement from 4.1.0 to 4.1.2

Updates the requirements on [postcss-nested](https://github.com/postcss/postcss-nested) to permit the latest version.
- [Release notes](https://github.com/postcss/postcss-nested/releases)
- [Changelog](https://github.com/postcss/postcss-nested/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss-nested/compare/4.1.0...4.1.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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