Switch to laminas http

[TheWhisp]

laminas/laminas-server (2.17.0) drops requirement for laminas/laminas-zendframework-bridge (which is abandoned now)

[klevu]

@TheWhisp Thank you for reporting this and providing the pull request.

I have released a new version of the module to handle this issue.
We didn't use your pull request (though it looked perfectly good) as the 3.x branch of this module supports Magento 2.3 and 2.4. We may still have some merchants running Magento versions prior to 2.3.5 when Laminas was introduced.

With this in mind, we have created a new module which merchants on older versions can remove via Composer replace.
This new module replaces Zend with Laminas. The new module is automatically included when upgrading to 3.5.0.

This new module can be found here https://github.com/klevu/api-request.
and is required here https://github.com/klevu/productsearch/blob/3.x/composer.json#L14

We have added a Knowledge Base article for this issue with an explanation as to which versions of our module will support this change going forward. https://help.klevu.com/support/solutions/articles/5000887379-http-client-change-zend-to-laminas

Kind Regards,
Richard.

[klevu]

Closing this PR as a fix has been released.
There is a related (closed) issue which we will keep pinned for visibility.
#97