test_bump_spdx_document fails with python3.14

[santiagorr]

Hi there,

Trying to build tools-python on Debian with python3.14 ends up in error:

=================================== FAILURES ===================================
___________________________ test_bump_spdx_document ____________________________

    def test_bump_spdx_document():
        spdx2_document: Spdx2_Document = document_fixture()
        spdx2_document.creation_info.creators.append(actor_fixture(ActorType.TOOL, "tool_name", None))
        document_namespace = document_fixture().creation_info.document_namespace
    
        payload: Payload = bump_spdx_document(spdx2_document)
    
>       write_payload(payload, sys.stdout)

tests/spdx3/bump/test_spdx_document_bump.py:21: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
spdx_tools/spdx3/writer/console/payload_writer.py:64: in write_payload
    write_method(element, text_output)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

relationship = Relationship(spdx_id='https://some.namespace#SPDXRef-Relationship-0', creation_info=None, name=None, summary=None, des...#SPDXRef-File'], relationship_type=<RelationshipType.DESCRIBES: 15>, completeness=None, start_time=None, end_time=None)
text_output = <EncodedFile name="<_io.FileIO name=6 mode='rb+' closefd=True>" mode='r+' encoding='utf-8'>
heading = True

    def write_relationship(relationship: Relationship, text_output: TextIO, heading: bool = True):
        if heading:
            text_output.write("## Relationship\n")
        write_element_properties(relationship, text_output)
>       for property_name in relationship.__annotations__.keys():
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       AttributeError: 'Relationship' object has no attribute '__annotations__'. Did you mean: '__annotate_func__'?

spdx_tools/spdx3/writer/console/relationship_writer.py:15: AttributeError
...

This can be seen at https://salsa.debian.org/python-team/packages/python-spdx-tools/-/jobs/8720947#L2243.

This error doesn't happen building with python3.13 (only): https://salsa.debian.org/python-team/packages/python-spdx-tools/-/jobs/8607066.