Conflict between django 1.11 support and versioning moving beyond 1.11

[marksweb]

The base requirements for tests installs versioning, however versioning has dropped support for django 1.11. Specifically with it's use of django 2 url paths.

Django 1.11 either needs to be dropped or the requirements for it need to install an earlier version of versioning.

Error seen in workflows;

 File "/home/runner/work/djangocms-url-manager/djangocms-url-manager/djangocms_url_manager/admin.py", line 3, in <module>
    from djangocms_url_manager.cms_config import UrlCMSAppConfig
  File "/home/runner/work/djangocms-url-manager/djangocms-url-manager/djangocms_url_manager/cms_config.py", line 99, in <module>
    class UrlCMSAppConfig(CMSAppConfig):
  File "/home/runner/work/djangocms-url-manager/djangocms-url-manager/djangocms_url_manager/cms_config.py", line 121, in UrlCMSAppConfig
    from djangocms_versioning.datastructures import VersionableItem, default_copy
  File "/opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/djangocms_versioning/datastructures.py", line 8, in <module>
    from .admin import VersioningAdminMixin
  File "/opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/djangocms_versioning/admin.py", line 13, in <module>
    from django.urls import re_path, reverse
ImportError: cannot import name 're_path'

[Aiky30]

This has been patched in the release/1.0.x stream, currently master, When this change is brought in this will no longer be an issue: #66