Try fix platform test on CI #239

Job	Run time
Platform test (7.4)	3m 44s
Platform test (8.0)	4m 46s
Platform test (8.1)	3m 34s
Platform test (8.2)	3m 33s
Platform test (8.3)	3m 52s
Platform test (8.4)	3m 43s
Platform test (8.1, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 13s
Platform test (8.2, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 44s
Platform test (8.3, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 28s
Platform test (8.4, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 32s
	36m 9s

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