tests for unpacking #91

Job	Run time
clippy	29s
Check	42s
Rustfmt	18s
coverage	3m 9s
test (ubuntu-22.04)	47s
Build library (ubuntu-latest, linux)	1m 45s
test (ubuntu-latest-arm-8-cores)	58s
Build library (ubuntu-latest-arm-8-cores, linux-arm64)	1m 25s
test (macos-13)	1m 3s
Build library (self-hosted, macos, arm64, macos-arm64)	1m 1s
test (self-hosted, macos, arm64)	23s
Build library (macos-13, macos)	1m 44s
test (windows-2022)	1m 25s
Build library (windows-2022, windows)	3m 4s
Publish release	0s
	18m 13s

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