Set client request data

[webong]

What does this PR do?

This PR enables a setRequestData method on the paystack class and accepts an array of data thereby adding the data to the Http request instance.

How should this be manually tested?

To use this method

$data = [
            'name'          => "Xeviant Paystack",
            'description'   => "Test Transaction",
            'amount'        => "1000",
        ];
// Using Paystack Facade
Paystack::setRequestData($data)->createPlan();

[bosunski]

Thanks, @webong, this is well thought of!

Can you fix the Styles CI error? then we can merge