chore(deps): update dependency postcss-font-magician to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-font-magician	3.0.0 -> 4.0.0

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Release Notes

csstools/postcss-font-magician (postcss-font-magician)

v4.0.0

Compare Source

• Drop support for Node versions older than 18
• Add ignore feature #​70
• Fix support for postcss-load-config #​102
• Fix repo and homepage urls #​101
• Fix typo in readme #​87
• Fix source maps #​109
• Fix output path for async option, this is now relative to the process. (BREAKING!)
• Fix order of CSS, now the @font-face will be inserted after @charset, @import and similar statements. #​107

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