Issue #3413783 by DYdave, Liam Morland: Updated module's...
requested to merge issue/block_class-3413783:3413783-update-maxlength_attributes-default-value into 2.0.x
https://www.drupal.org/project/block_class/issues/3413783
Updated module's maxlength_attributes config default value to 255 to fix schema validation error raised by tests:
Drupal\Core\Config\Schema\SchemaIncompleteException: Schema errors for block_class.settings with the following errors: block_class.settings:maxlength_attributes variable type is boolean but applied schema class is Drupal\Core\TypedData\Plugin\DataType\IntegerData