PHP 7.0.x 弃用的功能：静态调用非静态的方法 #16
Description
根据官方文档：PHP 7.0.x 弃用的功能→静态调用非静态的方法
http://www.php.net/manual/zh/migration70.deprecated.php
在weworkapi_php-master\api\src\CorpAPI.class.php中，有多处静态调用Utils::Object2Array，会报错：
Deprecated: Non-static method Utils::Object2Array() should not be called statically in D:\Software\Wampserver\www\weworkapi_php-master\api\src\CorpAPI.class.php on line 438
Deprecated: Non-static method Utils::Object2Array() should not be called statically in D:\Software\Wampserver\www\weworkapi_php-master\utils\Utils.class.php on line 75