Errors running MCMD with Python 3.6. Documentation to be updated to require a newer version?

[colthom]

How to Reproduce

Install molgenis-commander with python 3.6

$ docker run --rm -it python:3.6 bash
root@xxx:/# pip3 install molgenis-commander -qqq
root@xxx:/# pip3 install --upgrade molgenis-commander -qqq
root@xxx:/# mcmd

Expected behavior

ℹ Looks like this is your first time running Molgenis Commander!
  Let's take a moment to set things up. It's OK to leave some fields empty, you can always change them later.
? Enter the absolute path to your Molgenis git folder (e.g. /Users/me/git/molgenis/)

Observed behavior

Traceback (most recent call last):
  File "/usr/local/bin/mcmd", line 5, in <module>
    from mcmd.__main__ import main
  File "/usr/local/lib/python3.6/site-packages/mcmd/__main__.py", line 17, in <module>
    from mcmd.core import update_checker, store
  File "/usr/local/lib/python3.6/site-packages/mcmd/core/update_checker.py", line 10, in <module>
    from mcmd.core import store
  File "/usr/local/lib/python3.6/site-packages/mcmd/core/store.py", line 11, in <module>
    from mcmd.core.context import context
  File "/usr/local/lib/python3.6/site-packages/mcmd/core/context/__init__.py", line 9, in <module>
    from mcmd.core.context import _context_holder
  File "/usr/local/lib/python3.6/site-packages/mcmd/core/context/_context_holder.py", line 3, in <module>
    from mcmd.core.context.base_context import Context
  File "/usr/local/lib/python3.6/site-packages/mcmd/core/context/base_context.py", line 68, in <module>
    import mcmd.core.context._context_holder as context_holder
AttributeError: module 'mcmd.core' has no attribute 'context'