Use PHP 8 features #1029

Job	Run time
PHP 8.2	12s
PHP 8.3	18s
Integration tests with PHP 8.2	51s
extra/cache-extra with PHP 8.2	24s
extra/cssinliner-extra with PHP 8.2	13s
extra/html-extra with PHP 8.2	14s
extra/inky-extra with PHP 8.2	12s
extra/intl-extra with PHP 8.2	14s
extra/markdown-extra with PHP 8.2	22s
extra/string-extra with PHP 8.2	21s
extra/twig-extra-bundle with PHP 8.2	19s
extra/cache-extra with PHP 8.3	13s
extra/cssinliner-extra with PHP 8.3	15s
extra/html-extra with PHP 8.3	19s
extra/inky-extra with PHP 8.3	13s
extra/intl-extra with PHP 8.3	17s
extra/markdown-extra with PHP 8.3	12s
extra/string-extra with PHP 8.3	12s
extra/twig-extra-bundle with PHP 8.3	15s
	5m 36s

Provide feedback