chore(deps): bump lettermint from 2.0.0 to 2.1.0 (#159)

Bumps [lettermint](https://github.com/lettermint/lettermint-node) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/lettermint/lettermint-node/releases)
- [Changelog](https://github.com/lettermint/lettermint-node/blob/main/CHANGELOG.md)
- [Commits](lettermint/lettermint-node@v2.0.0...v2.1.0)

---
updated-dependencies:
- dependency-name: lettermint
  dependency-version: 2.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]