misc (install): Lower default setuptools version From 0d607b6ed49eab758fd9b272e148f032e65fb2e2 Mon Sep 17 00:00:00 2001 python-setuptools 5.7 is not yet in Debian, so we need to set the default version to 5.5 (the current version in sid) to avoid the newer version to be downloaded from pypi.