Support Django 5.2 and Python 3.13, drop Python 3.8 #150

Job	Run time
tests_node	13s
Test on Python 3.9 and Django 4.2 on postgres	1m 18s
Test on Python 3.10 and Django 4.2 on postgres	1m 2s
Test on Python 3.11 and Django 4.2 on postgres	1m 6s
Test on Python 3.12 and Django 4.2 on postgres	2m 29s
Test on Python 3.13 and Django 4.2 on postgres	1m 2s
Test on Python 3.10 and Django 5.0 on postgres	59s
Test on Python 3.11 and Django 5.0 on postgres	1m 21s
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 41s
Test on Python 3.11 and Django 5.1 on postgres	2m 0s
Test on Python 3.12 and Django 5.1 on postgres	1m 1s
Test on Python 3.13 and Django 5.1 on postgres	58s
Test on Python 3.10 and Django 5.2 on postgres	1m 3s
Test on Python 3.11 and Django 5.2 on postgres	1m 4s
Test on Python 3.12 and Django 5.2 on postgres	1m 1s
Test on Python 3.13 and Django 5.2 on postgres	1m 23s
Test on Python 3.9 and Django 4.2 on sqlite	1m 3s
	21m 47s

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