Lint

feat: add Docker credential helper for Cloudsmith registries #118

Job	Run time
Check import sorting (isort)	31s
Check code formatting (black)	34s
Check for typos (typos)	6s
Check code style (flake8)	24s
Run comprehensive linting (pylint)	40s
Check for Python upgrades (pyupgrade)	30s
	2m 45s

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