chore(deps): bump sabberworm/php-css-parser from 8.8.0 to 9.0.0

Bumps [sabberworm/php-css-parser](https://github.com/MyIntervals/PHP-CSS-Parser) from 8.8.0 to 9.0.0.
- [Release notes](https://github.com/MyIntervals/PHP-CSS-Parser/releases)
- [Changelog](https://github.com/MyIntervals/PHP-CSS-Parser/blob/main/CHANGELOG.md)
- [Commits](MyIntervals/PHP-CSS-Parser@v8.8.0...v9.0.0)

---
updated-dependencies:
- dependency-name: sabberworm/php-css-parser
  dependency-version: 9.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -76,7 +76,7 @@
 		"masterminds/html5": "^2.7",
 		"tubalmartin/cssmin": "^4.1",
 		"wptt/webfont-loader": "^1.1",
-		"sabberworm/php-css-parser": "^8.4",
+		"sabberworm/php-css-parser": "^9.0",
 		"stripe/stripe-php": "^15.3",
 		"enshrined/svg-sanitize": "^0.21.0"
 	}