Convert release-branches.py and update-required-checks.sh to TypeScript
#497
| Job | Run time |
|---|---|
| 1m 6s | |
| 1m 10s | |
| 1m 6s | |
| 59s | |
| 57s | |
| 1m 8s | |
| 1m 2s | |
| 1m 9s | |
| 8m 37s |