feat: update to yamale 6.1.0 (#41) #110

Job	Run time
Run tests (nostrict, ./tests/nostrict/schema.yaml, ./tests/nostrict/invalid-not-a-boolean.yaml, t...	14s
Run tests (nostrict, ./tests/nostrict/schema.yaml, ./tests/nostrict/valid-extra-argument.yaml, tr...	17s
Run tests (nostrict, ./tests/nostrict/schema.yaml, ./tests/nostrict/valid-matching-fields.yaml, t...	14s
Run tests (strict, ./tests/strict/schema.yaml, ./tests/strict/valid-matching-fields.yaml, false, ...	10s
Run tests (nostrict, ./tests/nostrict/schema.yaml, ./tests/nostrict/invalid-nums-out-of-range.yam...	14s
Run tests (strict, ./tests/strict/schema.yaml, ./tests/strict/invalid-extra-argument.yaml, false,...	14s
	1m 23s

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