Bump ip from 1.1.8 to 1.1.9 in /backend

Bumps [ip](https://github.com/indutny/node-ip) from 1.1.8 to 1.1.9.
- [Commits](indutny/node-ip@v1.1.8...v1.1.9)

---
updated-dependencies:
- dependency-name: ip
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]