Update request and rust-platform-verifier (#673)

## Type of change
```
- [ ] Bug fix
- [ ] New feature development
- [x] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other
```

## Objective
Previously rust-platform-verifier was pinned to an old version to keep
it's rustls version the same as reqwest. The latest update to reqwest
now contains a new rustls version which unblocks this update.