chore(deps): bump nats from 1.4.12 to 2.1.0

Bumps [nats](https://github.com/nats-io/nats.js) from 1.4.12 to 2.1.0.
- [Release notes](https://github.com/nats-io/nats.js/releases)
- [Commits](nats-io/nats.js@v1.4.12...v2.1.0)

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