Update yoast/phpunit-polyfills requirement from ^2.0 to ^4.0 in the dev-dependencies group across 1 directory #135

Job	Run time
PHPMD (PHP 8.3)	17s
PHPCS (PHP 8.3)	22s
WP VIP CS (PHP 8.3)	21s
PHPStan for WP (PHP 8.3)	16s
Psalm Static Analysis (PHP 8.3)	17s
Security Scan (PHP 8.3)	23s
WP Plugin Check (PHP 8.3)	1m 53s
Test WordPress 6.6 with PHP 8.2	1m 2s
Test WordPress nightly with PHP 8.2	1m 10s
Test WordPress latest with PHP 8.2	1m 10s
Test WordPress 6.6 with PHP 8.5	1m 10s
Test WordPress nightly with PHP 8.1	1m 12s
Test WordPress latest with PHP 8.4	1m 5s
Test WordPress nightly with PHP 8.3	1m 0s
Test WordPress 6.6 with PHP 8.3	1m 1s
Test WordPress latest with PHP 8.3	1m 17s
Test WordPress latest with PHP 8.1	1m 4s
Test WordPress nightly with PHP 8.4	1m 11s
Test WordPress 6.6 with PHP 8.4	1m 6s
Test WordPress 6.6 with PHP 8.1	1m 11s
Test WordPress latest with PHP 8.5	1m 14s
Test WordPress nightly with PHP 8.5	1m 18s
	21m 0s

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