Issue #3516156 by dydave: Updated composer file to replace 'require' with 'suggest'.

David Suissarequested to merge
issue/image_link_formatter-3516156:3516156-update-module-composer into 2.2.x

https://www.drupal.org/project/image_link_formatter/issues/3516156

Updated composer file to replace require with suggest.

Additional change: Moved the PHPSTAN rule limit to the Gitlab CI config file and remove phpstan.neon.

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