proj: update numpy and minimal python version #1491

Job	Run time
get-commit-message	3s
test-gpu (cufinufft)	11m 29s
test-cpu (finufft)	16m 47s
test-gpu (gpunufft)	12m 44s
test-cpu (pynfft)	4m 40s
test-cpu (sigpy)	4m 30s
test-gpu (torchkbnufft-gpu)	14m 58s
test-examples	23m 2s
Build API Documentation	10m 47s
coverage	28s
Compile the coverage badge in docs	19s
	1h 39m 47s

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