chore(deps): Widen cw-celerytask-helpers version range again

This time no upper range.
3 jobs for branch/default in 2 minutes and 36 seconds (queued for 6 seconds)
Status Name Job ID Coverage
  Lint
passed flake8 #201850

00:00:24

 
  Tests
failed py27 #201851
allowed to fail

00:01:05

passed py3 #201852

00:02:11

 
Name Stage Failure
failed
py27 Tests
py27 run-test-pre: PYTHONHASHSEED='442509097'
py27 run-test: commands[0] | pifpaf run redis --port 6380 -- /builds/cubicweb/cubes/celerytask/.tox/py27/bin/python -m pytest test
ERROR [pifpaf] 'module' object has no attribute 'fsdecode'
ERROR: InvocationError for command /builds/cubicweb/cubes/celerytask/.tox/py27/bin/pifpaf run redis --port 6380 -- .tox/py27/bin/python -m pytest test (exited with code 1)
___________________________________ summary ____________________________________
ERROR: py27: commands failed
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: command terminated with exit code 1