build(deps-dev): bump commitizen from 2.18.1 to 2.20.0 (#367)

Bumps [commitizen](https://github.com/commitizen-tools/commitizen) from 2.18.1 to 2.20.0.
- [Release notes](https://github.com/commitizen-tools/commitizen/releases)
- [Changelog](https://github.com/commitizen-tools/commitizen/blob/master/CHANGELOG.md)
- [Commits](commitizen-tools/commitizen@v2.18.1...v2.20.0)

---
updated-dependencies:
- dependency-name: commitizen
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Pipfile

@@ -12,7 +12,7 @@ pytest-mock = "==3.6.1"
 pytest-timeout = "==1.4.2"
 mock = "==4.0.3"
 pre-commit = "==2.15.0"
-commitizen = "==2.18.1"
+commitizen = "==2.20.0"
 mypy = "==0.910"
 flake8 = "==3.9.2"
 isort = "==5.9.3"