Merge pull request #32 from MoeCasts/patch-2

Add zh-CN trans

Author: Babichev Maxim

resources/lang/zh-CN/errors.php

@@ -0,0 +1,8 @@
+<?php
+
+return [
+    'price_positive' => '价格不能为负数',
+    'product_stock' => '库存不足',
+    'wallet_empty' => '钱包为空',
+    'insufficient_funds' => '余额不足',
+];