Bump nconf from 0.10.0 to 0.11.4

Bumps [nconf](https://github.com/flatiron/nconf) from 0.10.0 to 0.11.4.
- [Release notes](https://github.com/flatiron/nconf/releases)
- [Changelog](https://github.com/indexzero/nconf/blob/master/CHANGELOG.md)
- [Commits](indexzero/nconf@0.10.0...v0.11.4)

---
updated-dependencies:
- dependency-name: nconf
  dependency-type: direct:development
...

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Author: dependabot[bot]