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

4 jobs for !39 with topic/default/set_cubes_cw_max_version in 3 minutes and 19 seconds (queued for 2 seconds)
latest merge request
Name Stage Failure
failed
py27 Tests
-> creating tables  
-> inserting default user and default groups.
-> storing the schema in the database
-> database for instance data initialized.
ERROR: InvocationError for command /builds/cubicweb/cubes/jsonschema/.tox/py27/bin/python -m coverage run -m unittest discover -s test -c (exited with code 1)
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ERROR: py27: commands failed
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1
failed
py3 Tests
Uploading artifacts for failed job
WARNING: py3-deprecated-warnings.json: no matching files
ERROR: No files to upload
Uploading artifacts...
Uploading artifacts...
WARNING: report.xml: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1