Repo Maintenance Release 0.0.3

Added a new hook: check-dev-files. Once this hook is added to a repo, new checks added to the ComPWA/repo-maintenance repo are automatically enforced.

repos:
  - repo: https://github.com/ComPWA/repo-maintenance
    rev: 0.0.2
    hooks:
      - id: check-dev-files
      - id: fix-first-nbcell
      - id: fix-nbformat-version

Currently only contains a check on whether a [pre-commit hook for EditorConfig]https://github.com/editorconfig-checker/editorconfig-checker.python) has been added, and checks whether labels.toml has been removed.