Bump the npm_and_yarn group across 1 directory with 2 updates

Bumps the npm_and_yarn group with 2 updates in the /prototypes/yjs directory: [elliptic](https://github.com/indutny/elliptic) and [http-proxy-middleware](https://github.com/chimurai/http-proxy-middleware).


Updates `elliptic` from 6.5.7 to 6.6.0
- [Commits](indutny/elliptic@v6.5.7...v6.6.0)

Updates `http-proxy-middleware` from 2.0.6 to 2.0.7
- [Release notes](https://github.com/chimurai/http-proxy-middleware/releases)
- [Changelog](https://github.com/chimurai/http-proxy-middleware/blob/v2.0.7/CHANGELOG.md)
- [Commits](chimurai/http-proxy-middleware@v2.0.6...v2.0.7)

---
updated-dependencies:
- dependency-name: elliptic
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: http-proxy-middleware
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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