Bump sabberworm/php-css-parser from 8.5.1 to 8.7.0 #11676

Job	Run time
Pre run	6s
Lint: JS	25s
Feature tests: PHP 7.4, WP latest	36s
E2E test: JS (1, 2)	47s
Feature tests: PHP 8.4, WP trunk	32s
Lint: CSS	0s
E2E test: JS (2, 2)	27s
Feature tests: PHP 8.3, WP trunk	31s
Lint: PHP	13s
Feature tests: PHP 8.2, WP trunk	34s
Feature tests: PHP 8.1, WP trunk	39s
Static Analysis: PHP	19s
Unit test: JS	30s
Feature tests: PHP 8.0, WP latest	45s
Unit test: PHP 8.0, WP latest	40s
Unit test: PHP 8.4, WP trunk	33s
Unit test: PHP 8.3, WP trunk	43s
Unit test: PHP 8.2, WP trunk	51s
Feature tests: PHP 7.4, WP 6.5	39s
Unit test: PHP 8.1, WP trunk	32s
Unit test: PHP 8.0, WP trunk	41s
Unit test (with coverage): PHP 8.0, WP latest	35s
Unit test: PHP 8.0, WP latest	41s
Unit test: PHP 7.4, WP latest	40s
Unit test: PHP 7.4, WP latest	38s
Unit test: PHP 7.4, WP 6.5	41s
Unit test: PHP 7.4, WP 6.5	34s
	14m 52s

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