bug: Deprecations in PHP 8.4

[Aviortheking]

What is Hapening

in PHP 8.4 example

    Deprecated: Creation of dynamic property TCGdex\Model\Set::$abbreviation is deprecated
    Deprecated: Creation of dynamic property TCGdex\Model\Serie::$firstSet is deprecated
    Deprecated: Creation of dynamic property TCGdex\Model\Serie::$lastSet is deprecated

Please explain what should happen

no depecation messages should appear

Please give us a way to reproduce

run the project using PHP 8.4