Update qore-xml-module to version 0.5.

Patches have been applied upstream.

release notes:
This release of the yaml module includes bug fixes and major new features
such as:

* Support for the DataStream Protocol allowing point-to-point data streaming
  over HTTP using YAML-serialized chunks of data;
  the following user modules support this:
  - DataStreamClient
  - DataStreamRequestHandler
  - DataStreamUtil
* new function naming convention

(nros)