Fix for CVE-2019-5312 in Wechat-Group/WxJava (project Wechat-Group__WxJava_CVE-2019-5312_3.3.1.B), commit 8ec61d1328f50e23cd14285a950ca57a088b32b2
Fixed file: weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/BaseWxPayResult.java
Fixed class: BaseWxPayResult (lines 42-244)
Fixed method: getXmlDoc (lines 184-196)
Method signature: Document getXmlDoc()