Mark all result methods in AbstractQuery as impure #199

Job	Run time
Platform test (7.4)	2m 58s
Platform test (8.0)	2m 55s
Platform test (8.1)	2m 50s
Platform test (8.2)	3m 9s
Platform test (8.3)	2m 53s
Platform test (8.4)	3m 1s
Platform test (8.1, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 16s
Platform test (8.2, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 27s
Platform test (8.3, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	2m 49s
Platform test (8.4, doctrine/orm:^3.0 doctrine/dbal:^4.0 carbonphp/carbon-doctrine-types:^3 gedmo...	3m 15s
	29m 33s

Provide feedback