Enabled parallel tests #756

Job	Run time
Check for news fragments in 'changelog.d/'	6s
Test Python 3.10, Django 4.2, Redis.py latest	1m 39s
Lint (black)	20s
Test Python 3.10, Django 5.0, Redis.py latest	1m 48s
Lint (ruff)	24s
Test Python 3.10, Django 5.1, Redis.py latest	1m 47s
Lint (mypy)	32s
Test Python 3.11, Django 4.2, Redis.py latest	1m 45s
Test Python 3.11, Django 5.0, Redis.py latest	1m 51s
Test Python 3.11, Django 5.1, Redis.py latest	1m 39s
Test Python 3.12, Django 4.2, Redis.py latest	1m 42s
Test Python 3.12, Django 5.0, Redis.py latest	1m 53s
Test Python 3.12, Django 5.1, Redis.py latest	1m 43s
Test Python 3.8, Django 4.2, Redis.py latest	2m 9s
Test Python 3.9, Django 4.2, Redis.py latest	1m 51s
Test Python 3.12, Django 5.1, Redis.py master	1m 43s
Test Python 3.12, Django main, Redis.py latest	1m 49s
Test Python 3.12, Django main, Redis.py master	1m 52s
	26m 33s

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