Bump postcss from 8.2.1 to 8.3.4

[dependabot]

Bumps postcss from 8.2.1 to 8.3.4.

Release notes

Sourced from postcss's releases.

8.3.4

• Fixed broken AST detection.

8.3.3

• Fixed broken AST on postcss dependency duplication in custom parsers.

8.3.2

• Update changelog.

8.3.1

• Fixed false positives PostCSS does nothing warning on syntax option.

8.3 “Duke Murmur”

PostCSS 8.3 improved source map parsing performance, added Node#assign() shortcut, and experimental Document node to AST.

Thanks to Sponsors

This release was possible thanks to our community.

If your company wants to support the sustainability of front-end infrastructure or wants to give some love to PostCSS, you can join our supporters by:

• Tidelift with a Spotify-like subscription model supporting all projects from your lock file.
• Direct donations in PostCSS & Autoprefixer Open Collective.

Source Map Performance

Because PostCSS needs synchronous API, we can’t move from the old `source-map 0.6 to 0.7 (many other open-source projects too).

@​7rulnik forked source-map 0.6 to source-map-js and back-ported performance improvements from 0.7. In 8.3 we switched from source-map to this source-map-js fork.

You map see 4x performance improvements in parsing map from processing step before PostCSS (for instance, Sass).

Document Nodes

Thanks to @​gucong3000, PostCSS already parse CSS from HTML and JS files (CSS-in-JS templates and objects).

But his plugin need big updates. @​hudochenkov from stylelint team decided to create new parsers for styles inside CSS-in-JS, HTML, and Markdown.

He suggested adding new Document node type to PostCSS AST to keep multiple Root nodes inside and JS/HTML/Markdown code blocks between these style blocks.

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Changelog

Sourced from postcss's changelog.

8.3.4

• Fixed broken AST detection.

8.3.3

• Fixed broken AST on postcss dependency duplication in custom parsers.

8.3.2

• Update changelog.

8.3.1

• Fixed false positives PostCSS does nothing warning on syntax option.

8.3 “Duke Murmur”

• Added Node#assign() shortcut (by Jonathan Neal).
• Added experimental Document node to AST (by Aleks Hudochenkov).
• Moved to faster fork of source-map (by Valentin Semirulnik).

Commits

• c7bae29 Release 8.3.4 version
• 8b4a8b1 Fix Node[my] hack
• 7ea0c9b Release 8.3.3 version
• ff6abab Fix Symbol description
• e51efa0 Fix import order
• 714c5c6 Require PostCSS peer dependency from parser
• d8edfed Hot fix for broken isClean on AST dublication
• 2da5501 Update dependencies
• 026416d Release 8.3.2 version
• 6c30324 Merge pull request #1600 from postcss/dependabot/npm_and_yarn/lodash-4.17.21
• Additional commits viewable in compare view

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