[Debian-med-packaging] Bug#950853: gffutils tests are timing out with Python 3.8

[Matthias Klose]

Package: src:python-gffutils
Version: 0.10.1-1
Severity: important
Tags: sid bullseye
User: debian-python at lists.debian.org
Usertags: python3.8

gffutils tests are timing out with Python 3.8, while they succeed when run with
3.7.  Currently only seen in an Ubuntu focal environment, however the upstream
sources don't mention 3.7 and 3.8 at all.

failing with 3.8:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/amd64/p/python-gffutils/20200202_092100_46ce6@/log.gz

succeeding with 3.7:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/amd64/p/python-gffutils/20200121_182358_4208a@/log.gz