Bug#1053941: python-geopandas: test failure with pandas 2.1

[Rebecca N. Palmer]

Package: src:python-geopandas
Version: 0.14.0-1
Control: block 1043240 by -1
python-geopandas fails its autopkgtest with pandas 2.1, currently in 
experimental.

Log:
https://ci.debian.net/data/autopkgtest/unstable/amd64/p/python-geopandas/38997837/log.gz

A common source of failures is new pandas FutureWarnings in tests that 
are set to fail on unexpected warnings.