Restrict the version of NumPy to 1.x until Raysect binaries built with NumPy 2 are available #361

Job	Run time
Run tests (oldest-supported-numpy, 3.7)	4m 58s
Run tests (oldest-supported-numpy, 3.8)	4m 53s
Run tests (oldest-supported-numpy, 3.9)	5m 1s
Run tests (oldest-supported-numpy, 3.10)	4m 42s
Run tests (numpy, 3.7)	5m 3s
Run tests (numpy, 3.8)	4m 48s
Run tests (numpy, 3.9)	4m 52s
Run tests (numpy, 3.10)	4m 49s
	39m 6s

Provide feedback