Rust

refactor calculate_hashes #164

Job	Run time
build	26s
linting	15s
cross-testing (stable, ubuntu-latest, default)	15s
cross-testing (stable, ubuntu-latest, with-serde)	16s
cross-testing (stable, windows-latest, default)	1m 6s
cross-testing (stable, windows-latest, with-serde)	1m 5s
cross-testing (stable, macos-latest, default)	27s
cross-testing (stable, macos-latest, with-serde)	29s
cross-testing (nightly, ubuntu-latest, default)	15s
cross-testing (nightly, ubuntu-latest, with-serde)	18s
cross-testing (nightly, windows-latest, default)	1m 16s
cross-testing (nightly, windows-latest, with-serde)	1m 1s
cross-testing (nightly, macos-latest, default)	55s
cross-testing (nightly, macos-latest, with-serde)	23s
cross-testing (1.41, ubuntu-latest, default)	15s
cross-testing (1.41, ubuntu-latest, with-serde)	23s
cross-testing (1.41, windows-latest, default)	1m 4s
cross-testing (1.41, windows-latest, with-serde)	1m 6s
cross-testing (1.41, macos-latest, default)	23s
cross-testing (1.41, macos-latest, with-serde)	31s
	12m 9s

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