chore(deps): Bump postcss and cssnano

[dependabot]

Bumps postcss and cssnano. These dependencies needed to be updated together.
Updates postcss from 8.4.26 to 8.4.31

Release notes

Sourced from postcss's releases.

8.4.31

• Fixed \r parsing to fix CVE-2023-44270.

8.4.30

• Improved source map performance (by @​romainmenke).

8.4.29

• Fixed Node#source.offset (by @​idoros).
• Fixed docs (by @​coliff).

8.4.28

• Fixed Root.source.end for better source map (by @​romainmenke).
• Fixed Result.root types when process() has no parser.

8.4.27

• Fixed Container clone methods types.

Changelog

Sourced from postcss's changelog.

8.4.31

• Fixed \r parsing to fix CVE-2023-44270.

8.4.30

• Improved source map performance (by Romain Menke).

8.4.29

• Fixed Node#source.offset (by Ido Rosenthal).
• Fixed docs (by Christian Oliff).

8.4.28

• Fixed Root.source.end for better source map (by Romain Menke).
• Fixed Result.root types when process() has no parser.

8.4.27

• Fixed Container clone methods types.

Commits

• 90208de Release 8.4.31 version
• 58cc860 Fix carrier return parsing
• 4fff8e4 Improve pnpm test output
• cd43ed1 Update dependencies
• caa916b Update dependencies
• 8972f76 Typo
• 11a5286 Typo
• 45c5501 Release 8.4.30 version
• bc3c341 Update linter
• b2be58a Merge pull request #1881 from romainmenke/improve-sourcemap-performance--phil...
• Additional commits viewable in compare view

Updates cssnano from 4.1.11 to 6.0.1

Release notes

Sourced from cssnano's releases.

v6.0.1

Bug Fixes

• fix(postcss-merge-rules): do not merge nested rules (cssnano/cssnano@eb9a9a1)
• fix(postcss-reduce-idents): minify grid line names correctly (cssnano/cssnano@2af6687)

v6.0.0

Major Changes

• 99d1e6ab: postcss-normalize-url: remove normalize-url configuration options
• 4e272f88: postcss-svgo: Upgrade dependency svgo to v3 and increase the minimum supported node version to v14
• ca9d3f55: Switch minimum supported Node version to 14 for all packages
• 39a20405: feat!(cssnano): remove undocumented YAML config support

Migration instructions

• If you're not happy with the defaults for the normalize-url transform, turn it off completely. Options were removed as most would change the meaning of the URL, which is unexpcted in the case of CSS minification.
• In the unlikely event you're using YAML to configure cssnano, move the cssnano configuration inside the PostCSS config or use a configuration file in CommonJS or JSON format.

v5.1.15

Bug Fixes

• fix(postcsss-reduce-initial): fix mask-repeat conversion
• fix(postcss-colormin): don't minify colors in src declarations
• fix(postcss-merge-rules): do not merge conflicting flex and border properties

v5.1.14

Bug Fixes

• fix: update autoprefixer and browserslist
• fix(postcss-reduce-initial): improve initial properties data

v5.1.13

Bug Fixes

• fix TypeScript type of cssnano() return value (cssnano/cssnano@b92dbe3)

v5.1.12

Bug Fixes

• fix: preserve hyphenated property case (cssnano/cssnano@120a888)
• fix: ensure sorting properties does not break the output (cssnano/cssnano@0a3a133)
• fix: recognize 'constant' as a function (cssnano/cssnano@858a8b7)

v5.1.11

Bug Fixes

• postcss-ordered-values: preserve constant values (32ab4d9b7d20d)

v5.1.10

Bug Fixes

• postcss-minify-selectors: preserve similar nested selectors (f6c29fb3e75ac26a2635d)

v5.1.9

Bug Fixes

• postcss-merge-longhand: preserve more color function fallbacks (712993cb4a4e0)

... (truncated)

Commits

• 690358c Publish cssnano 6.0.1
• 0cdcaf7 chore: update postcss-calc to 9.0
• 2af6687 fix(postcss-reduce-idents): fix line names grid templates
• eb9a9a1 fix(postcss-merge-rules): do not merge rules with nested rules
• a580534 test(postcss-merge-rules): test container queries
• fae4813 chore: update development dependencies
• 74bd8da chore: update pnpm-lock version
• 7b68ad7 docs: update website for release (#1486)
• 10dd3cf chore: update CLI example for 6.0 release (#1485)
• 8e89938 Publish cssnano 6.0 (#1484)
• Additional commits viewable in compare view

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