Enabled parallel tests #741

Job	Run time
Check for news fragments in 'changelog.d/'	5s
Lint (black)	21s
Test Python 3.10, Django 4.2, Redis.py latest	1m 44s
Lint (ruff)	17s
Test Python 3.10, Django 5.0, Redis.py latest	1m 39s
Lint (mypy)	29s
Test Python 3.10, Django 5.1, Redis.py latest	1m 38s
Test Python 3.11, Django 4.2, Redis.py latest	1m 38s
Test Python 3.11, Django 5.0, Redis.py latest	2m 1s
Test Python 3.11, Django 5.1, Redis.py latest	1m 46s
Test Python 3.12, Django 4.2, Redis.py latest	40s
Test Python 3.12, Django 5.0, Redis.py latest	41s
Test Python 3.12, Django 5.1, Redis.py latest	40s
Test Python 3.8, Django 4.2, Redis.py latest	1m 51s
Test Python 3.9, Django 4.2, Redis.py latest	1m 38s
Test Python 3.12, Django 5.1, Redis.py master	59s
Test Python 3.12, Django main, Redis.py latest	36s
Test Python 3.12, Django main, Redis.py master	35s
	19m 18s

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