v3.37.0 Release
- Support HTTP Digest Authentication: https://req.cool/docs/tutorial/authentication/#set-digest-auth
- Add global wrappers.
- Reset file reader when retry a multipart file upload.
- Add nil check to SetSuccessResult and SetErrorResult.
- Allow PATCH multipart request.
- Fix transport middleware not work after clone(#233).
- Fix client middleware not work after clone.