chore(deps): update dependency postcss-cli to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-cli	4.1.1 -> 9.0.2

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Release Notes

postcss/postcss-cli

v9.0.2

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• Switch to picocolors (#​409)
• Remove test files from npm package

v9.0.1

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• Actually exit with error when attempting to stdout in watch mode
• Remove bin/ from files in package.json

v9.0.0

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• BREAKING: Require Node.js v12+
• BREAKING: Must specify full file path, including .js extension, when loading local plugins with --use (#​401)
• BREAKING: Officially remove support for watching postcss config (was already broken in previous releases)
• Add support for dir-dependency messages (#​383, #​391)
• Update deps

v8.3.1

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• Ensure paths are not interpreted as numbers (#​360)
• Better errors for incorrect postcss version (#​361, #​362)

v8.3.0

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• Exit on EOF/^D (#​358)

v8.2.0

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• Allow backslashes in paths for better Windows experence (#​355)

v8.1.0

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• Add support for postcss.config.cjs files (#​351)

v8.0.0

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• BREAKING: Support postcss v8 (#​344, #​349)
• BREAKING: postcss is now a peerDependency, you must install it seperately (#​344, #​349)
• Upgrade dependencies (#​340)

v7.1.2

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• Make --version machine-readable (#​334, #​335)
• Organize and clarify --help text (#​336)
• Update dependencies

v7.1.1

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• Fix bug where external source maps were not properly generated (#​324)
• Update dependencies

v7.1.0

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• Respect map.annotation option when set to a string (#​307)

v7.0.0

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• BREAKING: Drop support for Node 6 & 8
• Update globby, which may be a breaking change for a small number of users using certain glob patterns, see https://github.com/mrmlnc/fast-glob#pattern-syntax for details (#​303)
• Update dependencies

v6.1.3

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• Fix external sorcemap filenames when the directory name contains .css (#​283, #​286)

v6.1.2

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• Upgrade dependency globby to fix bug in sub-dependency (#​265, #​270)

v6.1.1

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• Fix empty lines being printed in some cases (#​256, #​257)

v6.1.0

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• Add --include-dotfiles flag to allow globs to match dotfiles. (#​254)
• Only log warning messages. This has always been intended behavior, but it wasn't working as expected. (#​244)

v6.0.1

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• Better error handling for errors thrown by plugins (#​242, #​243)
• Update dependencies
• Clarify docs (#​233)

v6.0.0

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• Drop support for Node 4
• Upgrade to postcss v7 (release notes)
• Upgrade to postcss-load-config v2 (release notes)

v5.0.1

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• Shallow copy options object; fixes a few edge cases
• Adjust options for file watching to play better with some editors

v5.0.0

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• Now allows passing a directory as the input (all files in the directory will be processed)
• The CLI is now silent by default; added --verbose flag for if you want noisy logs
• Doesn't exit watch mode when there's an error in the plugin chain
• Removed non-obvious shorthand arguments (-x, -p, -s, -t, -e, -b, & -c). Also removed -v as an alias for --version.
• Prevent stupid option combinations like --dir & -o, and --watch & --replace
• Doesn't allow --watch when writing to STDOUT

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