Tests

Bump phpunit/phpunit from 10.5.16 to 10.5.21 #40

Job	Run time
PHP 8.2 on ubuntu-latest w/ install	12s
PHP 8.2 on ubuntu-latest w/ update	13s
PHP 8.2 on windows-latest w/ install	42s
PHP 8.2 on windows-latest w/ update	41s
PHP 8.2 on macOS-latest w/ install	1m 11s
PHP 8.2 on macOS-latest w/ update	1m 10s
PHP 8.3 on ubuntu-latest w/ install	16s
PHP 8.3 on ubuntu-latest w/ update	12s
PHP 8.3 on windows-latest w/ install	47s
PHP 8.3 on windows-latest w/ update	48s
PHP 8.3 on macOS-latest w/ install	1m 11s
PHP 8.3 on macOS-latest w/ update	1m 18s
PHP 8.4 on ubuntu-latest w/ install	12s
PHP 8.4 on ubuntu-latest w/ update	18s
PHP 8.4 on windows-latest w/ install	33s
PHP 8.4 on windows-latest w/ update	34s
PHP 8.4 on macOS-latest w/ install	1m 12s
PHP 8.4 on macOS-latest w/ update	1m 16s
	12m 46s

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