require the map & union enabled version of schema-salad #741

Job	Run time
CI linters via Tox (lint-readme)	19s
cwl-utils release test	1m 5s
CI linters via Tox (pydocstyle)	16s
CI tests via Tox (3, 8, lint)	1s
CI tests via Tox (3, 8, unit)	1s
CI tests via Tox (3, 8, bandit)	1s
CI tests via Tox (3, 8, mypy)	1s
CI tests via Tox (3, 9, lint)	1s
CI tests via Tox (3, 9, unit)	1s
CI tests via Tox (3, 9, bandit)	1s
CI tests via Tox (3, 9, mypy)	1s
CI tests via Tox (3, 10, lint)	26s
CI tests via Tox (3, 10, unit)	36s
CI tests via Tox (3, 10, bandit)	35s
CI tests via Tox (3, 10, mypy)	35s
CI tests via Tox (3, 11, lint)	18s
CI tests via Tox (3, 11, unit)	36s
CI tests via Tox (3, 11, bandit)	31s
CI tests via Tox (3, 11, mypy)	35s
CI tests via Tox (3, 12, lint)	1s
CI tests via Tox (3, 12, unit)	1s
CI tests via Tox (3, 12, bandit)	34s
CI tests via Tox (3, 12, mypy)	1s
	6m 37s

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