Bug#1011951: python-gevent: Build-Depends: libpython3.9-testsuite

[Emanuele Rocca]

tag 1011951 pending
thanks

Fixed in git:
https://salsa.debian.org/python-team/packages/python-gevent/-/blob/9fc8b389269f5d6415ef1019e81e2a458667829b/debian/changelog