Log Message:
Updated textproc/qore-yaml-module to version 0.6 .

Changes from release notes:
* improved the description for the DESERIALIZATION-ERROR exception
  for non-deserializable message bodies from HTTP servers with error
  responses
* added the YamlRpcConnection class to the YamlRpcClient module
* updated the DataStreamClient module for complex types and new
  internal RestClient API changes
* updated the DataStreamUtil module for complex types
* fixed a bug deserializing single-quoted strings; also serialized
  "!number" values will always include the tag to avoid potential
  future ambiguity
* improved argument error messages with RPC calls in the
  YamlRpcHandler module