Illegal character does not get sanitized.

[sladage]

The following code emits invalid xml:

import * as XB from 'xmlbuilder2'

const b = XB.create()
b.ele('doc').ele('test').txt('some & text; foo')
const xml = b.end()
console.log(xml)

expected:

<?xml version="1.0"?><doc><test>some &amp; text; foo</test></doc>

got

<?xml version="1.0"?><doc><test>some & text; foo</test></doc>

My guess is '& test;' gets recognized as an entity.

Version:

• xmlbuilder2 3.0.2