chore(deps): Bump config from 0.15.3 to 0.15.4 (#889)

Bumps [config](https://github.com/rust-cli/config-rs) from 0.15.3 to 0.15.4.
- [Changelog](https://github.com/rust-cli/config-rs/blob/main/CHANGELOG.md)
- [Commits](rust-cli/config-rs@v0.15.3...v0.15.4)

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

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