xmltodict typing for namespaces faulty

[Kane610]

Using these versions

"xmltodict==1.0.2"
"types-xmltodict==v1.0.1.20250920"

I get this report by mypy

axis/models/event.py:198: error: Argument "namespaces" to "parse" has incompatible type "dict[str, None]"; expected "dict[str, str] | None" [arg-type] link to code

the type should be dict[str, str | None] not just dict[str, str]

The documentation for xmltodict explicitly states it can be None

>>> namespaces = {
...     'http://defaultns.com/': None, # skip this namespace
...     'http://a.com/': 'ns_a', # collapse "http://a.com/" -> "ns_a"
... }

[srittau]

Due to the invariance of dict, it should probably be dict[str, str] | dict[str, None] | dict[str, str | None] | None. PR welcome!