chore(deps-dev): bump flake8-bugbear in /cfn-lint-serverless (#123)

Bumps [flake8-bugbear](https://github.com/PyCQA/flake8-bugbear) from 21.11.28 to 21.11.29.
- [Release notes](https://github.com/PyCQA/flake8-bugbear/releases)
- [Commits](PyCQA/flake8-bugbear@21.11.28...21.11.29)

---
updated-dependencies:
- dependency-name: flake8-bugbear
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

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

cfn-lint-serverless/pyproject.toml

@@ -19,7 +19,7 @@ coverage = "^6.2"
 flake8-variables-names = "^0.0.4"
 pytest-cov = "^3.0.0"
 flake8-eradicate = "^1.2.0"
-flake8-bugbear = "^21.11.28"
+flake8-bugbear = "^21.11.29"
 bandit = "^1.7.0"
 radon = "^5.1.0"
 xenon = "^0.8.0"