Lack of #[\ReturnTypeWillChange] or return types in certain files

[WektorPriv]

Hi, in version 6.7.1 there were #[\ReturnTypeWillChange] added, now they are missing from every version besides that 6.7.1, can we reintroduce them or add return types similarly to following PR: https://github.com/docusign/docusign-esign-php-client/pull/239/files

these are the functions that are failing in php 8+

offsetSet($offset, $value)
offsetUnset($offset)
offsetExists($offset)
offsetGet($offset)

Thanks in advance

[atillavanilla]

i just raised a pr for that