Bump elliptic

Bumps  and [elliptic](https://github.com/indutny/elliptic). These dependencies needed to be updated together.

Updates `elliptic` from 6.5.5 to 6.5.7
- [Commits](indutny/elliptic@v6.5.5...v6.5.7)

Updates `elliptic` from 6.5.4 to 6.5.7
- [Commits](indutny/elliptic@v6.5.5...v6.5.7)

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

Signed-off-by: dependabot[bot] <support@github.com>