Bump django-treebeard from 4.3 to 4.4

[dependabot-preview]

Bumps django-treebeard from 4.3 to 4.4.

Changelog

Sourced from django-treebeard's changelog.

Release 4.4 (Jan 13, 2021)

• Implement a non-destructive path-fixing algorithm for MP_Node.fix_tree.
• Ensure post_save is triggered after the parent node is updated in MP_AddChildHandler.
• Fix static URL generation to use static template tag instead of constructing the URL manually.
• Declare support for Django 2.2, 3.0 and 3.1.
• Drop support for Django 2.1 and lower.
• Drop support for Python 2.7 and Python 3.5.
• Increase performance for MoveNodeForm when using large trees.

Release 4.3.1 (Dec 25, 2019)

• Added check to avoid unnecessary database query for MP_Node.get_ancestors() if the node is a root node.
• Drop support for Python-3.4.
• Play more nicely with other form classes, that implement __init__(self, *args, **kwargs), e.g. django-parler's TranslatableModelForm, where kwargs.get('instance') is None when called from here.
• Sorting on path on necessary queries, fixes some issues and stabilizes the whole MP section.
• Add German translation strings.

Commits

• f904172 Merge branch 'master' of github.com:django-treebeard/django-treebeard
• 12d0d78 Merge branch 'master' of github.com:django-treebeard/django-treebeard
• f745612 Merge branch 'master' of github.com:django-treebeard/django-treebeard
• ee3ce02 Convert README to markdown format
• 3a283dc Convert README to markdown format
• 56609fa Prepare for version 4.4
• 28ab226 Merge pull request #186 from solarissmoke/feature/44
• 03fa7f3 Merge pull request #178 from girumb/105/Increase_performance_for_MoveNodeForm...
• 22aca33 Add back CI tests for MSSQL.
• 58dbe6b Prepare version 4.4
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #299 (58b67d1) into master (d5b5b2d) will increase coverage by 0.28%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #299      +/-   ##
==========================================
+ Coverage   34.82%   35.10%   +0.28%     
==========================================
  Files          38       40       +2     
  Lines        2481     2521      +40     
==========================================
+ Hits          864      885      +21     
- Misses       1617     1636      +19     

Impacted Files	Coverage Δ
apps/core/middlewares/locale.py	51.85% <0.00%> (ø)
apps/core/middlewares/auth.py	53.84% <0.00%> (ø)

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[dependabot-preview]

Superseded by #307.