fix --index-url handling for Poetry 1.8 - second try
#450
| Job | Run time |
|---|---|
| 40s | |
| 38s | |
| 35s | |
| 41s | |
| 36s | |
| 1m 18s | |
| 1m 22s | |
| 1m 36s | |
| 1m 27s | |
| 1m 51s | |
| 1m 21s | |
| 1m 23s | |
| 1m 10s | |
| 1m 12s | |
| 1m 21s | |
| 17m 11s |