build(deps): Bump nconf from 0.12.0 to 0.12.1

Bumps [nconf](https://github.com/flatiron/nconf) from 0.12.0 to 0.12.1.
- [Release notes](https://github.com/flatiron/nconf/releases)
- [Changelog](https://github.com/indexzero/nconf/blob/v0.12.1/CHANGELOG.md)
- [Commits](indexzero/nconf@v0.12.0...v0.12.1)

---
updated-dependencies:
- dependency-name: nconf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>