feat(payment): 调用微信支付退款接口

src/Model/ExtensionPaymentModel.php

@@ -36,6 +36,7 @@ class ExtensionPaymentModel extends Model
     protected array $type = [
         'biz_type' => PaymentBizEnum::class,
         'status' => PaymentStatusEnum::class,
+        'amount' => 'float',
         'payment_param' => 'json',
         'payment_result' => 'json',
     ];