fix(php): Deprecation warning fix for PHP 8.1+

[aykutersoy]

Native return types added for offsetExists, offsetGet, offsetSet, offsetUnset methods

🧭 What and Why

See: #3561

I had two option to get rid of deprecation messages, either add native types or add this #[\ReturnTypeWillChange] attribute. I opted in for native types.

🎟 JIRA Ticket: -

Changes included:

• List changes
• native return types added for offsetExists, offsetGet, offsetSet, offsetUnset methods

🧪 Test

[shortcuts]

Hey @aykutersoy thanks for trying out the client and providing a fix :) I've reverted some changes because they are generated files, changing the mustache one is enough

[aykutersoy]

Hey @shortcuts, thanks for looking into this super fast 🙌 also adding a new commit 😆

[shortcuts]

looks great, thanks for the contribution!

[aykutersoy]

Dang it!

@shortcuts There's one more method needs native return type
clients/algoliasearch-client-php/lib/Model/AbstractModel::jsonSerialize()
Shall I create another PR or leave it with you?

[shortcuts]

Dang it!

@shortcuts There's one more method needs native return type clients/algoliasearch-client-php/lib/Model/AbstractModel::jsonSerialize() Shall I create another PR or leave it with you?

if you need it asap it would be best for you to directly contribute, otherwise we can log it on our side and tackle that later

[aykutersoy]

if you need it asap it would be best for you to directly contribute, otherwise we can log it on our side and tackle that later

Done! Thank you 🙌