Wagtail 3.0, async task queues and more

This release adds support for Wagtail 3.0. It also add support for translation UI for custom ModelAdmin models and configurable background tasks

⚠️ this is the last release that supports Wagtail < 2.15

What's Changed

• Translatable ModelAdmin by @dinoperovic in #550
• [Wagtail mainline] keep up with mainline by @zerolab in #557
• Limit width of segments editor by @kaedroho in #561
• Add Django 4.0 classifier to setup.py by @lb- in #566
• Bump ansi-regex from 3.0.0 to 3.0.1 by @dependabot in #567
• Pin pygments to pre 2.12 release to fix mkdocs build failures by @zerolab in #568
• Add a mechanism for plugging in task queues by @kaedroho in #549
• Fix header styling for Wagtail 3.0 by @kaedroho in #560
• 3.0 official support and catch with wagtailmain by @zerolab in #569
• Fix further Wagtail main failures and tidy up GH Action/Makefile by @zerolab in #572

New Contributors

• @dinoperovic made their first contribution in #550
• @lb- made their first contribution in #566

Full Changelog: v1.1.2...v1.2