Support Django 5.2 and Python 3.13, drop Python 3.8 #151

Job	Run time
tests_node	13s
Test on Python 3.9 and Django 4.2 on postgres	1m 24s
Test on Python 3.10 and Django 4.2 on postgres	1m 15s
Test on Python 3.11 and Django 4.2 on postgres	1m 19s
Test on Python 3.12 and Django 4.2 on postgres	1m 7s
Test on Python 3.10 and Django 5.0 on postgres	1m 5s
Test on Python 3.11 and Django 5.0 on postgres	1m 15s
Test on Python 3.12 and Django 5.0 on postgres	1m 3s
Test on Python 3.10 and Django 5.1 on postgres	1m 6s
Test on Python 3.11 and Django 5.1 on postgres	58s
Test on Python 3.12 and Django 5.1 on postgres	5m 32s
Test on Python 3.13 and Django 5.1 on postgres	1m 23s
Test on Python 3.10 and Django 5.2 on postgres	1m 2s
Test on Python 3.11 and Django 5.2 on postgres	1m 17s
Test on Python 3.12 and Django 5.2 on postgres	1m 25s
Test on Python 3.13 and Django 5.2 on postgres	1m 15s
Test on Python 3.9 and Django 4.2 on sqlite	1m 8s
	23m 47s

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