TST: pin numpy<2 for tests with old astroscrappy #407

Job	Run time
ubuntu-py38-oldestdeps	1m 19s
macos-py310-astroscrappy11	2m 11s
ubuntu-py39	1m 17s
ubuntu-py39-bottleneck	1m 11s
ubuntu-py310	1m 8s
ubuntu-py311	58s
ubuntu-py312	1m 2s
macos-py312	47s
windows-py312	1m 32s
ubuntu-codestyle	10s
ubuntu-build_docs	1m 8s
ubuntu-py310-test-alldeps-devdeps	2m 37s
	15m 20s

Provide feedback