Drop support for Django 2.2

[hramezani]

No description provided.

[codecov]

Codecov Report

Merging #1551 (246fdee) into main (1964826) will increase coverage by 0.75%.
The diff coverage is 66.66%.

❗ Current head 246fdee differs from pull request most recent head 8acfbe5. Consider uploading reports for the commit 8acfbe5 to get more accurate results

@@            Coverage Diff             @@
##             main    #1551      +/-   ##
==========================================
+ Coverage   85.87%   86.62%   +0.75%     
==========================================
  Files          36       36              
  Lines        1883     1862      -21     
  Branches      310      303       -7     
==========================================
- Hits         1617     1613       -4     
+ Misses        187      175      -12     
+ Partials       79       74       -5     

Impacted Files	Coverage Δ
debug_toolbar/__init__.py	100.00% <ø> (+28.57%)	⬆️
debug_toolbar/panels/cache.py	78.66% <61.11%> (+6.10%)	⬆️
debug_toolbar/management/commands/debugsqlshell.py	100.00% <100.00%> (ø)
debug_toolbar/panels/settings.py	100.00% <100.00%> (+12.50%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1964826...8acfbe5. Read the comment docs.

[matthiask]

@hramezani Please try again, I pushed the wrong branch but I've reverted the change.

[matthiask]

Looks good already. There are still a few django.VERSION branches around which could be dropped as well, but we don't have to clean up everything at once.

[hramezani]

@matthiask I will find them and remove them

[matthiask]

I added a commit on top which installs gdal-bin before running tests. Now it's all green.