Description of the problem, including code/CLI snippet

Doing import gitlab (assuming it's the main way of using this) triggers "notices" when trying to use e.g. gitlab.const.AccessLevel.DEVELOPER

I assume the reason is

Expected Behavior

Typing

import gitlab

gitlab.const.AccessLevel.DEVELOPER

does not raise issues.

from gitlab import Gitlab, const works

Actual Behavior

Cannot find reference 'const' in 'gitlab' 

Specifications

• python-gitlab version: 8
• Gitlab server version (or gitlab.com):