The Mixed Content example for Text Object Conversion does not work.

[ghost]

Describe the bug
Cannot convert an object with text array ('#'=[]) to XML

To Reproduce
In your documentation you have the following mixed content example
obj2 = { monologue: {
'#': [
'Talk to me Goose!',
{ 'cut': 'dog tag shot' },
'Talk to me...'
]
} }
Attempting to convert it to XML with the following throws an exception:
const doc = xmlBuilder.create().ele(obj2 );
console.log(doc.end({ prettyPrint: true }));

This example throws and exception:
UnhandledPromiseRejectionWarning: InvalidCharacterError: The string contains invalid characters. Invalid XML name: 0
at InvalidCharacterError.DOMException [as constructor] (C:\development\node\XMLMapper\node_modules@oozcitak\dom\lib\dom\DOMException.js:28:28)
at new InvalidCharacterError (C:\development\node\XMLMapper\node_modules@oozcitak\dom\lib\dom\DOMException.js:342:23)
at namespace_validate (C:\development\node\XMLMapper\node_modules@oozcitak\dom\lib\algorithm\NamespaceAlgorithm.js:18:15)
at Object.namespace_extractQName (C:\development\node\XMLMapper\node_modules@oozcitak\dom\lib\algorithm\NamespaceAlgorithm.js:78:5)
at XMLBuilderImpl.ele (C:\development\node\XMLMapper\node_modules\xmlbuilder2\lib\builder\XMLBuilderImpl.js:109:41)
at ObjectReader.BaseReader._element (C:\development\node\XMLMapper\node_modules\xmlbuilder2\lib\readers\BaseReader.js:35:50)
at ObjectReader.BaseReader.element (C:\development\node\XMLMapper\node_modules\xmlbuilder2\lib\readers\BaseReader.js:113:21)
at ObjectReader. (C:\development\node\XMLMapper\node_modules\xmlbuilder2\lib\readers\ObjectReader.js:144:40)
at Object.forEachObject (C:\development\node\XMLMapper\node_modules@oozcitak\util\lib\index.js:106:26)
at ObjectReader._parse (C:\development\node\XMLMapper\node_modules\xmlbuilder2\lib\readers\ObjectReader.js:46:20)

Expected behavior
XML:
<monologue> Talk to me Goose! <cut>dog tag shot</cut> Talk to me... </monologue>

Version:

• node.js: [v14.17.0]
• xmlbuilder2 [2.4.1]