FEATURE: add api request for balances history

src/Http/Balances/HistoryRequest.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Vinkas\Airwallex\Http\Balances;
+
+use Saloon\Enums\Method;
+use Saloon\Http\Request;
+
+class HistoryRequest extends Request
+{
+    protected Method $method = Method::GET;
+
+    public function resolveEndpoint(): string
+    {
+        return 'balances/history';
+    }
+}

src/Http/Resources/BalancesResource.php

@@ -5,11 +5,17 @@
 use Saloon\Http\BaseResource;
 use Saloon\Http\Response;
 use Vinkas\Airwallex\Http\Balances\CurrentRequest;
+use Vinkas\Airwallex\Http\Balances\HistoryRequest;
 
 class BalancesResource extends BaseResource
 {
     public function getCurrent(): Response
     {
         return $this->connector->send(new CurrentRequest());
     }
+
+    public function getHistory(): Response
+    {
+        return $this->connector->send(new HistoryRequest());
+    }
 }