refactor!: use cfg(nightly) instead of feature, remove -Z flag, u…
#968
| Job | Run time |
|---|---|
| 6s | |
| 3m 38s | |
| 3m 33s | |
| 3m 44s | |
| 4m 47s | |
| 4m 15s | |
| 10m 15s | |
| 10m 32s | |
| 11m 10s | |
| 0s | |
| 52m 0s |