* feat: 增加微信支付查询结果 * feat: 增加微信支付查询结果 * fix: 修复golangci-lint失败 * fix: 修复golangci-lint失败 * refactor: 微信支付结果查询错误友好提示
* fix payRequset xml marshal: root element should be xml * support HMAC-SHA256 for unifiedorder api * support HMAC-SHA256 for PaidVerifySign * fix SignType is nil * fix code style * constantize SignType * add comments * fix code style