We use pylint-celery in edx-lint, and through it in several other edX repositories. But while it looks like it should work under Python 3, that actually hasn't been confirmed. Find out if it does, and submit changes accordingly.
Fork the pylint-celery repository, and start working in a local clone of your fork.
Update .travis.yml to add testing for Python 3.5, 3.6, and 3.7.
Update the trove classifiers in setup.py as described in OEP-7
Create a pull request with your changes, and find out if the tests pass.
The main goal for Open edX is just to find out if pylint-celery actually works with these Python versions, but it would be great if you could work with the pylint-celery author to get these changes merged to clarify its Python 3 support for other developers as well.