fix: django import error

[src-r-r]

Description

Just a simple PR to fix the import error. Line 5-9 are the "real" changes.

All the other changes you see are just the linter cleaning up the code.

Related resources

• https://github.com/django-cms/djangocms-bootstrap4/issues/161

Checklist

• [x] I have opened this pull request against master
• [x] I have added or modified the tests when changing logic
• [x] I have followed the conventional commits guidelines to add meaningful information into the changelog
• [x] I have read the contribution guidelines and I have joined #workgroup-pr-review on Slack to find a “pr review buddy” who is going to review my pull request.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (1726033) 98.94% compared to head (f78a1e3) 98.94%.

:exclamation: Current head f78a1e3 differs from pull request most recent head ff85640. Consider uploading reports for the commit ff85640 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #162 +/- ## ======================================= Coverage 98.94% 98.94% ======================================= Files 71 71 Lines 1228 1228 Branches 70 70 ======================================= Hits 1215 1215 Misses 8 8 Partials 5 5 ``` | [Files Changed](https://app.codecov.io/gh/django-cms/djangocms-bootstrap4/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=django-cms) | Coverage Δ | | |---|---|---| | [...gocms\_bootstrap4/contrib/bootstrap4\_grid/models.py](https://app.codecov.io/gh/django-cms/djangocms-bootstrap4/pull/162?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=django-cms#diff-ZGphbmdvY21zX2Jvb3RzdHJhcDQvY29udHJpYi9ib290c3RyYXA0X2dyaWQvbW9kZWxzLnB5) | `100.00% <100.00%> (ø)` | |

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[src-r-r]

Yikes, sorry about that, been stressing out about finding sustainable work so haven't gotten to it. It's super-quiet today so I'll work on it (BTW, if you happen to know of anyone who needs a team lead, feel free to reach out).

[brenosss]

HI, it looks like this change is required to use Django 4.2. Is there a plan to release those changes?