Bug#1058229: liac-arff ftbfs with Python 3.12 as default

[Yogeswaran Umasankar]

Hi,

I made a patch for AttributeError in tests with Python 3.12 and created
MR [0]

[0] https://salsa.debian.org/science-team/liac-arff/-/merge_requests/1

Cheers!