tox: added uv to allowlist_externals where necessary
#246
| Job | Run time |
|---|---|
| 3m 11s | |
| 3m 23s | |
| 3m 19s | |
| 3m 18s | |
| 4m 2s | |
| 3m 4s | |
| 2m 44s | |
| 3m 24s | |
| 2m 43s | |
| 3m 57s | |
| 0s | |
| 33m 5s |