pyxb is end of life

[mihxil]

PyXB is end of life, and does e.g. not work in python 3.8. Lets consider something different to (also) support. E.g. xsdata looks promising, or generateDS

[mihxil]

Trying it out in branch. First issue was no support for xi:type
(tefra/xsdata#306)

That was readily fixed. Next issue would be tefra/xsdata#332, which is a bit cumbersome to work around.

For most (if not all) calls we would know the actual type that is returned, but it would have to maintain it client side then, while the information is present in the generated xs-data call together with the namespaces and root element name of the response.

[mihxil]

I think the xsdata support is now good enough, and I will drop support for pyxb soon, which will simplify maintainance, but drop some backwards compatiblity.