[deps] Update django-organizations requirement from ~=2.1.0 to ~=2.4.1

Updates the requirements on [django-organizations](https://github.com/bennylope/django-organizations) to permit the latest version.
- [Release notes](https://github.com/bennylope/django-organizations/releases)
- [Changelog](https://github.com/bennylope/django-organizations/blob/master/HISTORY.rst)
- [Commits](bennylope/django-organizations@2.1.0...2.4.1)

---
updated-dependencies:
- dependency-name: django-organizations
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Gagan Deep <[email protected]>

openwisp_users/migrations/0001_initial.py

@@ -181,7 +181,6 @@ class Migration(migrations.Migration):
                 'abstract': False,
                 'ordering': ['name'],
             },
-            bases=(organizations.base.UnicodeMixin, models.Model),
         ),
         migrations.CreateModel(
             name='OrganizationOwner',
@@ -221,7 +220,6 @@ class Migration(migrations.Migration):
                 'verbose_name': 'organization owner',
                 'abstract': False,
             },
-            bases=(organizations.base.UnicodeMixin, models.Model),
         ),
         migrations.CreateModel(
             name='OrganizationUser',
@@ -271,7 +269,6 @@ class Migration(migrations.Migration):
                 'abstract': False,
                 'ordering': ['organization', 'user'],
             },
-            bases=(organizations.base.UnicodeMixin, models.Model),
         ),
         migrations.CreateModel(
             name='Group',

requirements.txt

@@ -1,4 +1,4 @@
-django-organizations~=2.1.0
+django-organizations~=2.4.1
 django-extensions~=3.2.3
 django-allauth~=0.54.0
 django-phonenumber-field~=8.0.0