Release 1.2.0

微信支付：

1. 扫码支付（模式一和模式二）
2. 公众号支付

Release 1.0.0

First release, provides the following service integration:

WechatCustomerService
WechatMediaService
WechatMenuService
WechatMessageService
WechatPromotionService
WechatResponseService
WechatTokenService
WechatUserService