fix: `collect_contract_names` (#221) #824

Job	Run time
doctest	1m 14s
feature-checks	3m 13s
clippy	44s
docs	25s
test stable (ubuntu-latest)	1m 5s
test stable --all-features (ubuntu-latest)	2m 9s
fmt	12s
test 1.70 (ubuntu-latest)	31s
test stable (macos-latest)	1m 7s
test stable --all-features (macos-latest)	2m 42s
test 1.70 (macos-latest)	45s
test stable (windows-latest)	3m 44s
test stable --all-features (windows-latest)	5m 30s
test 1.70 (windows-latest)	2m 30s
	25m 51s

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