Fix tests for numpy 2.0 #979

Job	Run time
Py3.10 mindeps	5m 0s
Py3.11 mindeps	6m 8s
Py3.12 mindeps	6m 24s
Py3.11 no visualization + coverage	8m 46s
Py3.8 mindeps	3m 29s
Py3.9 noviz	6m 7s
Py3.9 all	6m 9s
Py3.11 dev	6m 44s
Py3.11 viz	6m 50s
Py3.11 all dev	6m 56s
Py3.8 mindeps and CASA	4m 13s
Py3.10 mindeps and CASA	6m 9s
Py3.11, noviz, dev	7m 12s
Py3.8 noviz (except CASA)	3m 56s
Py3.11 noviz (except CASA) MacOS X	3m 47s
Py3.11, noviz Windows	11m 11s
Py3.11, noviz, dev; Windows	10m 42s
Documentation	1m 21s
	1h 51m 4s

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