build(deps): bump config from 0.15.11 to 0.15.12

---
updated-dependencies:
- dependency-name: config
  dependency-version: 0.15.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]