build: unpin numpy + use Python 3.9 in CI (#8492)
#2410
| Job | Run time |
|---|---|
| 5m 32s | |
| 5m 32s |
numpy + use Python 3.9 in CI (#8492)
#2410
| Job | Run time |
|---|---|
| 5m 32s | |
| 5m 32s |