Pin indexmap back to account for hashbrown MSRV bump
#15851
| Job | Run time |
|---|---|
| 4m 35s | |
| 1m 48s | |
| 2m 27s | |
| 2m 28s | |
| 4m 41s | |
| 1s | |
| 1s | |
| 1s | |
| 2m 2s | |
| 4m 29s | |
| 1s | |
| 1s | |
| 4m 28s | |
| 2m 40s | |
| 4m 42s | |
| 1m 54s | |
| 36m 19s |