Bug#1093350: poetry: FTBFS: AttributeError: 'Application' object has no attribute 'set_solution_provider_repository'

[Niko Sandschneider]

Downgrading python3-poetry-core from 2.0.1-2 to 1.9.0-2 fixes the issue
for me. It seems there is some kind of version conflict missing between
python3-poetry and python3-poetry-core.