After https://github.com/tefra/xsdata/commit/93a8ca0548d1f7badb628ad9fd0327672abe140b
`parser.register_namespace("xs", "http://www.w3.org/2001/XMLSchema")` started failing with `TypeError: PushParser.register_namespace() missing 1 required positional argument: 'uri'` since xsdata added a new argument `ns_map` (previously it was always using `parse.ns_map` under the hood, now it allows to provide some external dictionary). We just restore the original behaviour with internal `ns_map` by providing it explicitly.
Specified xsdata version after that change in pyproject.toml.
Also `serialize()` is now using `parser.ns_map` as a fallback value (otherwise why we do `parser.register_namespace` if we never used the `parser.ns_map`?)
* Refactored the BCF dir into a "src-layout" which I am more comfortable with. We can likely change this back if it is not compatible with other development
* I added a few setup files for the bcf package (setup.cfg, pyproject.toml and a MANIFEST.in file)
* Added two __init__.py files in the v2 and v3 subfolders for them to be picked up during package compilation
Dion Moult