From the related issue:

Some PHPCS sniffer rules return a value with their ->process method, pointing to an index in the file's token stack where the rule should turn back on. This allows them to recognize blocks of code where they do not apply.

An example of this can be seen with PSR12.Operators.OperatorSpacingSniff. It must use this ignore functionality to avoid adding spacing to the left/right of the = in declare(strict_types=1).

We don't currently respect any return code they provide, meaning using the PSR12 rules for ECS, PHPCS, and PHP CS Fixer together will become unresolvable.

Closes #215