Support Django 5.0 and Python 3.12, drop Python 3.7 (#373) #116

Job	Run time
tests_node	21s
Test on Python 3.8 and Django 3.2 on postgres	1m 59s
Test on Python 3.9 and Django 3.2 on postgres	1m 13s
Test on Python 3.10 and Django 3.2 on postgres	1m 7s
Test on Python 3.8 and Django 4.0 on postgres	1m 7s
Test on Python 3.9 and Django 4.0 on postgres	1m 1s
Test on Python 3.10 and Django 4.0 on postgres	1m 3s
Test on Python 3.8 and Django 4.1 on postgres	1m 15s
Test on Python 3.9 and Django 4.1 on postgres	1m 2s
Test on Python 3.10 and Django 4.1 on postgres	1m 16s
Test on Python 3.11 and Django 4.1 on postgres	1m 1s
Test on Python 3.8 and Django 4.2 on postgres	1m 23s
Test on Python 3.9 and Django 4.2 on postgres	1m 17s
Test on Python 3.10 and Django 4.2 on postgres	1m 4s
Test on Python 3.11 and Django 4.2 on postgres	1m 1s
Test on Python 3.12 and Django 4.2 on postgres	59s
Test on Python 3.10 and Django 5.0 on postgres	1m 5s
Test on Python 3.11 and Django 5.0 on postgres	59s
Test on Python 3.12 and Django 5.0 on postgres	1m 43s
Test on Python 3.8 and Django 3.2 on sqlite	1m 3s
	22m 59s

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