Should associative array => should be align with PHP-CS-Fixer ?
$array = [
1 => 'a',
'1' => 'b',
1.5 => 'c',
true => 'd',
];
or
$array = [
1 => 'a',
'1' => 'b',
1.5 => 'c',
true => 'd',
];
I didn't find filter for that in https://github.com/FriendsOfPHP/PHP-CS-Fixer
For PHP-CS-Fixer v1, it used to be the option: align_double_arrow
For newer versions, check the other answer.