Setup mutation testing #308

Job	Run time
Platform test (8.0)	31s
Platform test (8.2)	2m 28s
Platform test (8.2, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 25s
Platform test (7.4)	30s
Platform test (8.1)	34s
Platform test (8.4)	2m 33s
Platform test (8.4, true)	36s
Platform test (8.3, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 31s
Platform test (8.4, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 21s
Platform test (8.1, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	34s
Platform test (8.3)	2m 52s
	17m 55s

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