settings method call fails

[CycloneAxe]

When you call settings ( 'key', 'default value') method, if the incoming key does not exist, there will be a fatal mistake,because when Krucas\Settings\Settings::get method during processing, Repository has a non-existent key returns the default value, and Krucas\Settings\Settings::get only determine the acquired value is not empty proceeds unserializeValue operations, without taking into Repository returns a default value