Support RM4SCC and KIX

I've been working on KIX support (Dutch variant of RM4SCC https://en.wikipedia.org/wiki/RM4SCC) for your generator. It's a bit different than the other codes you support, so I had to add a different way of drawing bars in the barcode drawing functions in the svg and canvas renderers.

Could you have a look and check if this would be something you would pull? If so, I can also add the RM4SCC and correct validation for KIX (not needed for my own use): https://github.com/abmaonline/JsBarcode/tree/kix_support

Start by reviewing the linked kix_support branch and the SVG and canvas renderer drawing functions, then compare its KIX work with the existing barcode formats. Done means RM4SCC and KIX are supported with correct KIX validation and matching bar rendering in both renderers.

Written by the indexing model from the issue text.