HashMap and HashSet #53

Job	Run time
Address Sanitizer Test	19s
Linting	16s
Test (ubuntu-latest)	19s
Miri Test	40s
Test (ubuntu-latest, --release)	17s
Test (ubuntu-latest, --features=no_std)	16s
Test (ubuntu-latest, --features=no_std, --release)	16s
Test (windows-latest)	1m 55s
Test (windows-latest, --release)	1m 25s
Test (windows-latest, --features=no_std)	2m 16s
Test (windows-latest, --features=no_std, --release)	1m 12s
Test (macos-latest)	21s
Test (macos-latest, --release)	21s
Test (macos-latest, --features=no_std)	20s
Test (macos-latest, --features=no_std, --release)	34s
Test (macos-12)	33s
Test (macos-12, --release)	32s
Test (macos-12, --features=no_std)	34s
Test (macos-12, --features=no_std, --release)	47s
	13m 13s

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