添加获取幸运星场次信息接口

src/ucenter/Luckdraw.php

+<?php
+/**
+ * Created by PhpStorm.
+ * User: QQ
+ * Date: 2018/4/20
+ * Time: 16:49
+ */
+
+namespace internalApi\ucenter;
+
+use internalApi\base\Client;
+
+class Luckdraw extends Client
+{
+    /**
+     * 获取幸运星正在进行场次
+     * @return mixed
+     */
+    public static function getLuckdrawShow()
+    {
+        return self::call('luckdraw.getLuckdrawShow');
+    }
+}
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