Added parsers for CWL input files #711

Job	Run time
cwl-utils release test	4m 31s
CI linters via Tox (lint-readme)	22s
CI tests via Tox (3, 8, lint)	33s
CI linters via Tox (pydocstyle)	16s
CI tests via Tox (3, 8, unit)	3m 41s
CI tests via Tox (3, 8, bandit)	52s
CI tests via Tox (3, 8, mypy)	1m 31s
CI tests via Tox (3, 9, lint)	34s
CI tests via Tox (3, 9, unit)	1m 55s
CI tests via Tox (3, 9, bandit)	49s
CI tests via Tox (3, 9, mypy)	1m 20s
CI tests via Tox (3, 10, lint)	2m 19s
CI tests via Tox (3, 10, unit)	2m 11s
CI tests via Tox (3, 10, bandit)	1m 0s
CI tests via Tox (3, 10, mypy)	1m 25s
CI tests via Tox (3, 11, lint)	35s
CI tests via Tox (3, 11, unit)	3m 26s
CI tests via Tox (3, 11, bandit)	51s
CI tests via Tox (3, 11, mypy)	1m 19s
CI tests via Tox (3, 12, lint)	59s
CI tests via Tox (3, 12, unit)	3m 39s
CI tests via Tox (3, 12, bandit)	1m 17s
CI tests via Tox (3, 12, mypy)	1m 53s
	37m 18s

Provide feedback