Update dependency postcss-import to v14

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-import	^12.0.0 -> ^14.0.0

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Release Notes

postcss/postcss-import

v14.1.0

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• Add @layer support (#​483)

v14.0.2

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• Remove remaining direct import of postcss package (#​455, #​456)

v14.0.1

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• Fix bug with @charset statements in media imports (#​448, #​453)

v14.0.0

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This release should not have breaking changes for the vast majority of users; only those with @charset statements in their CSS may be affected.

• BREAKING: Error if multiple incompatible @charset statements (#​447)
• BREAKING: Warn if @charset statements are not at the top of files (#​447)
• Fix handing of @charset (#​436, #​447)

v13.0.0

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• BREAKING: Require Node 10+ (#​429)
• BREAKING: Upgrade to postcss v8 and require it as a peerDependency (#​427, #​432)
• Update dependencies

v12.0.1

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• Add plugin property to dependency messages (#​379, #​380)

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