change is_null to $value compare to null
for consistency with #3520
Merge branch 'hotfix/#6643-is-null-removal'

Close #6643
Fixes cs : space after if and elseif in deep conditional
iirc, I already sent a request to php-cs-fixer repository for its feature but it won't be implemented because it require to much logic
space after close parenthesis
Merge branch 'hotfix/#6743-if-spacing-psr2-compliance'

Close #6743
activate Exception in Validator/Between::__construct
patch ZendTest/File/Transfer/Adapter/AbstractTest.php because require Validator\Between
patch to allow parameter 1st and 2nd as "min" and "max", and patch ValidatorChainTest.php
update condition for !array_key_exists