Support Django 5.0 and Python 3.12, drop Python 3.8 #109

Job	Run time
tests_node	18s
Test on Python 3.7 and Django 3.2 on postgres	1m 11s
Test on Python 3.8 and Django 3.2 on postgres	1m 13s
Test on Python 3.9 and Django 3.2 on postgres	1m 2s
Test on Python 3.10 and Django 3.2 on postgres	1m 3s
Test on Python 3.8 and Django 4.0 on postgres	1m 1s
Test on Python 3.9 and Django 4.0 on postgres	1m 9s
Test on Python 3.10 and Django 4.0 on postgres	1m 15s
Test on Python 3.8 and Django 4.1 on postgres	1m 0s
Test on Python 3.9 and Django 4.1 on postgres	1m 4s
Test on Python 3.10 and Django 4.1 on postgres	1m 2s
Test on Python 3.11 and Django 4.1 on postgres	1m 6s
Test on Python 3.8 and Django 4.2 on postgres	1m 15s
Test on Python 3.9 and Django 4.2 on postgres	1m 14s
Test on Python 3.10 and Django 4.2 on postgres	1m 11s
Test on Python 3.11 and Django 4.2 on postgres	1m 0s
Test on Python 3.12 and Django 4.2 on postgres	1m 3s
Test on Python 3.10 and Django 5.0 on postgres	1m 16s
Test on Python 3.11 and Django 5.0 on postgres	1m 22s
Test on Python 3.12 and Django 5.0 on postgres	1m 0s
Test on Python 3.7 and Django 3.2 on sqlite	1m 32s
	23m 17s

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