fix: correctly merge restrictions #874

Job	Run time
docs	1m 11s
doctest	1m 4s
feature-checks	2m 59s
clippy	59s
fmt	14s
test stable (ubuntu-latest)	59s
test stable --all-features (ubuntu-latest)	1m 48s
test 1.83 (ubuntu-latest)	1m 1s
test stable (macos-latest)	1m 3s
test stable --all-features (macos-latest)	2m 13s
test 1.83 (macos-latest)	55s
test stable (windows-latest)	3m 30s
test stable --all-features (windows-latest)	4m 41s
test 1.83 (windows-latest)	3m 7s
deny / cargo deny check	17s
	26m 1s

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