Convert release-branches.py and update-required-checks.sh to TypeScript
#14550
| Job | Run time |
|---|---|
| 40s | |
| 5s | |
| 1m 8s | |
| 1m 28s | |
| 54s | |
| 1m 43s | |
| 1m 5s | |
| 57s | |
| 8m 0s |