fix(deps): bump sabberworm/php-css-parser from 8.6.0 to ^8.7.0 (main)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sabberworm/php-css-parser (source)	^8.6.0 -> ^8.7.0

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Release Notes

MyIntervals/PHP-CSS-Parser (sabberworm/php-css-parser)

v8.7.0: : Add support for PHP 8.4

Compare Source

Added

• Add support for PHP 8.4 (#​675, #​701, #​746, #​751)

Changed

• Mark parsing-internal classes and methods as @internal (#​711)
• Block installations on unsupported higher PHP versions (#​691)

Deprecated

• Deprecate the expansion of shorthand properties (#​719)
• Deprecate Parser::setCharset() and Parser::getCharset() (#​703)

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