Upgrade to Django 4 to fix OL map

[Xpirix]

• This PR is addressing the following issue: Feed entry, set spatial filter windows is empty #56

I suspected mismatched Django versions between my local and the production environment. I noticed that the OpenLayers map in the Set spatial filter modal doesn't show when using Django 3. I've tried the current and the last patched version (3.2.11 and 3.2.23). It works fine after upgrading to Django 4.2.8.

Changes summary:

• Upgrade to Django 4, and update some dependencies in the requirements.

Requirement:

• These changes require a build on the server side.

Please find below the screenshot of the Set spatial filter modal when using Django 4:

[haubourg]

Cool thanks!
In the long run a dockerised dev environment can help to have the same env as the server has.

Go for merge !

[Xpirix]

My pleasure.

You're right, having a dockerized development environment helps mirror the server environment and is easy to run. Thanks for the tip.

[Xpirix]

Upgrading to Django 4 involves upgrading other stacks on the server side (PostGIS, docker engine...) and may cause downtime so we need to plan it correctly. For now, I will try another method to fix the map in the spatial filter window.