2.92.0
(feat): XML (TwiML) types can now carry XML comments. Comment(text) adds <!--text--> inside the element at its
position in the ordered content (interleaved with AddText segments and child elements), while
CommentBefore(text) / CommentAfter(text) render a comment immediately before or after the element
itself (as a sibling in its parent, or around the root element after the XML declaration). Comments in
parsed documents are preserved by FromXml and round-trip through ToXml; XmlElement.AddComment and
the new XmlComment runtime type expose the same for untyped elements.
2.91.0
(feat): Generate a unit test file per XML-encoded (TwiML) type alongside the models, covering
fromXml/toXml round trips, escaping, unknown attributes/children, open enum passthrough,
child ordering, and rejection of malformed XML, wrong root elements and DOCTYPE declarations.