Lint

feat: add Docker credential helper for Cloudsmith registries #125

Job	Run time
Check for Python upgrades (pyupgrade)	25s
Check code formatting (black)	30s
Run comprehensive linting (pylint)	39s
Check import sorting (isort)	27s
Check for typos (typos)	8s
Check code style (flake8)	29s
	2m 38s

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