Test

Remove support for EOL Python 3.7 #595

Job	Run time
Python 3.8, Database sqlite	1m 58s
Python 3.8, Database postgres	1m 54s
Python 3.9, Database sqlite	1m 30s
Python 3.9, Database postgres	1m 32s
Python 3.10, Database sqlite	2m 33s
Python 3.10, Database postgres	2m 2s
Python 3.11, Database sqlite	1m 31s
Python 3.11, Database postgres	1m 41s
Python 3.12, Database sqlite	59s
Python 3.12, Database postgres	56s
Python pypy-3.8, Database sqlite	2m 8s
Python pypy-3.8, Database postgres	2m 5s
Python pypy-3.9, Database sqlite	2m 25s
Python pypy-3.9, Database postgres	2m 1s
	25m 15s

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