Class imports aren't strictly correct

[mewejo]

Hi,

I've been using the SDK today and it's been great, thank you.

However upon opening a PR and running PHPStan on the code, it's throwing the following error:

 ------ --------------------------------------------------------------------------------- 
  Line   Http/Controllers/GoCardlessWebhookController.php                                 
 ------ --------------------------------------------------------------------------------- 
  28     Parameter #2 $event of method                                                    
         Grizzlyware\Cub\Invoicing\PaymentGatewayDrivers\GoCardlessDriver::handleEvent()  
         expects GoCardlessPro\Resources\Event,                                           
         GoCardlessPro\GoCardlessPro\Resources\Event given.                               
 ------ --------------------------------------------------------------------------------- 

gocardless-pro-php/lib/Webhook.php

Line 25 in bae1786

* @return GoCardlessPro\Resources\Event[] the events included in the

I expect the same issue is true for the exception below it too. While IDEs can work around it, PHPStan is rightly complaining about it.