Update phpstan-phpunit to 2.0.8 (#706) #477

Job	Run time
Platform test (7.4)	3m 2s
Platform test (8.0)	2m 45s
Platform test (8.3, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 31s
Platform test (8.1, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 15s
Platform test (8.3)	2m 46s
Platform test (8.2, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 51s
Platform test (8.4)	2m 57s
Platform test (8.4, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 27s
Platform test (8.1)	2m 34s
Platform test (8.2)	3m 5s
	27m 13s

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