add OptionXXX methods, change `SetBodyXml` to SetBodyXML
[feature] v0.4.0 ## Feature - add request/response `TraceInfo` method - add `SetBaseURL` method - add `EnableTrace/DisableTrace` method ## Fixed - fixed session.Do() body un closed
update dependencies
[fix] 修复可能造成的Body未Close内存泄漏
[fixed] request header missing
[EXAMPLE] Basic Authentication
[fix] change testing code
[fix] create new atomic id for copy request
[fix] session.Do() middleware
[feature] middleware