chore: removed final keyword on classes to make them mockable

Author: frknasir

.DS_Store

@@ -6,7 +6,7 @@
 use StarfolkSoftware\Paystack\HttpClient\Message\ResponseMediator;
 use StarfolkSoftware\Paystack\Options\Customer as CustomerOptions;
 
-final class Customer extends ApiAbstract
+class Customer extends ApiAbstract
 {
     /**
      * Creates a new customer

src/API/Customer.php

@@ -6,7 +6,7 @@
 use StarfolkSoftware\Paystack\HttpClient\Message\ResponseMediator;
 use StarfolkSoftware\Paystack\Options\Invoice as InvoiceOptions;
 
-final class Invoice extends ApiAbstract
+class Invoice extends ApiAbstract
 {
     /**
      * Creates a new invoice

src/API/Invoice.php

@@ -6,7 +6,7 @@
 use StarfolkSoftware\Paystack\HttpClient\Message\ResponseMediator;
 use StarfolkSoftware\Paystack\Options\Plan as PlanOptions;
 
-final class Plan extends ApiAbstract
+class Plan extends ApiAbstract
 {
     /**
      * Creates a new plan

src/API/Plan.php

@@ -6,7 +6,7 @@
 use StarfolkSoftware\Paystack\HttpClient\Message\ResponseMediator;
 use StarfolkSoftware\Paystack\Options\Subscription as SubscriptionOptions;
 
-final class Subscription extends ApiAbstract
+class Subscription extends ApiAbstract
 {
     /**
      * Creates a new subscription

src/API/Subscription.php

@@ -6,7 +6,7 @@
 use StarfolkSoftware\Paystack\HttpClient\Message\ResponseMediator;
 use StarfolkSoftware\Paystack\Options\Transaction as TransactionOptions;
 
-final class Transaction extends ApiAbstract
+class Transaction extends ApiAbstract
 {
     /**
      * Initialize Transaction

src/API/Transaction.php

@@ -14,7 +14,7 @@
  *
  * Website: http://github.com/starfolksoftware/paystack-php
  */
-final class Client
+class Client
 {
     /** @var ClientBuilder $clientBuilder */
     private ClientBuilder $clientBuilder;

src/Client.php

@@ -12,7 +12,7 @@
 use Psr\Http\Message\RequestFactoryInterface;
 use Psr\Http\Message\StreamFactoryInterface;
 
-final class ClientBuilder
+class ClientBuilder
 {
     private ClientInterface $httpClient;
 

src/ClientBuilder.php

@@ -4,7 +4,7 @@
 
 use Psr\Http\Message\ResponseInterface;
 
-final class ResponseMediator
+class ResponseMediator
 {
     public static function getContent(ResponseInterface $response): array
     {

src/HttpClient/Message/ResponseMediator.php

@@ -7,7 +7,7 @@
 use Psr\Http\Message\UriInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
-final class Options
+class Options
 {
     private array $options;