Remove use of xml2js

[abmusse]

As described in #344

xml2js to parse XML output from itoolkit. xml2js doesn't appear to be actively maintained and has issues with [parsing blank values from non-named keys](https://github.com/Leonidas-from-

Remove xml2js from our:

• tests test: Replace xml2js with fast-xml-parser #399
• internal calls in Deprecated.js
• docs (Docs: Reference alternate XML parser #345)