chore(deps): update dependency postcss-cli to v11

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
postcss-cli	9.1.0 → 11.0.1

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Release Notes

postcss/postcss-cli (postcss-cli)

v11.0.1

Compare Source

• Update and minimize dependencies

v11.0.0

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• BREAKING: Require Node.js v18+ (#​464)
• Upgrade to postcss-load-config@5 for improved ESM & TS config support (#​461, #​462)

v10.1.0

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• Allow running --watch mode in non-TTY contexts, like Docker (#​448)
• Update dependencies

v10.0.0

Compare Source

• BREAKING: Drop Node 12 support (#​438)
• Add support for ESM config files (#​437)

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