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

2 jobs for !25 with topic/default/set_cubes_cw_max_version in 2 minutes and 42 seconds (queued for 26 seconds)
latest detached
Status Name Job ID Coverage
  Lint
passed check-manifest #461448
lint check-manifest

00:00:42

 
  Tests
passed py3 #461449
tests py3

00:01:59