* check test coverage and write necessary tests
* validate XML stream data
* Fix jTox for json array. Not sure if a bug exist.
* generate separate and combined browser bundle for xml -> nimn, xml -> json , json -> xml
* Es6 to es5 migration without workaround.
* Parse JSON string to XML. Currently it transforms JSON object to XML. Partially done. Need to work on performance.
* build properties only once
* XML to JSON ML : https://en.wikipedia.org/wiki/JsonML