Bump elliptic from 6.5.2 to 6.5.3 in /vuejs/vuejs

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.2 to 6.5.3.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.2...v6.5.3)

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