feat(setup.py): increase cubicweb max version to 3.31.x

3 jobs for !25 with topic/default/set_cubes_cw_max_version in 3 minutes and 50 seconds (queued for 6 seconds)
latest detached
Status Name Job ID Coverage
  Lint
passed check-manifest #461113
lint check-manifest

00:01:26

passed flake8 #461112
lint flake8

00:01:59

 
  Tests
passed py3 #461114
tests py3

00:01:51