2.30.8
(fix): XML (TwiML) serialization drops characters outside the XML 1.0 Char production (e.g. \x01) from text and attribute values, consistently across SDK languages.
2.30.7
(fix): XML (TwiML) types gain asXML(bool $xmlDeclaration = true) as an alias of toXml(), matching
the legacy TwiML SDK and SimpleXMLElement::asXML().