chore(deps-dev): bump cowlib from 2.14.0 to 2.15.0 in the dev group (#770)

Bumps the dev group with 1 update: [cowlib](https://github.com/ninenines/cowlib).


Updates `cowlib` from 2.14.0 to 2.15.0
- [Commits](ninenines/cowlib@2.14.0...2.15.0)

---
updated-dependencies:
- dependency-name: cowlib
  dependency-version: 2.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev
...

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Author: dependabot[bot]