Bump elliptic from 6.6.0 to 6.6.1

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.6.0 to 6.6.1.
- [Commits](indutny/elliptic@v6.6.0...v6.6.1)

---
updated-dependencies:
- dependency-name: elliptic
  dependency-type: direct:production
...

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

Author: dependabot[bot]