Bump postcss from 8.5.3 to 8.5.4

[dependabot[bot]]

Bumps postcss from 8.5.3 to 8.5.4.

Release notes

Sourced from postcss's releases.

8.5.4

• Fixed Parcel compatibility issue (by @​git-sumitchaudhary).

Changelog

Sourced from postcss's changelog.

8.5.4

• Fixed Parcel compatibility issue (by @​git-sumitchaudhary).

Commits

• 6cb4a66 Release 8.5.4 version
• ec5c1e0 Update dependencies
• e85e938 Fix code format
• 5054233 fixed error at line 401 (#2046)
• 0538b63 docs: Update README.md (#2044)
• b5f407f Add postcss-fontsource-url to plugins (#2043)
• 94b5260 Clarify documentation for node.source.end.offset (#2032)
• a20724a Fix Markdown syntax
• cf6b969 fix: add a mention for postcssense extension (#2040)
• ff48c29 Increase size
• Additional commits viewable in compare view

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