claim trait to allow non-fallible cloning #37

Job	Run time
Linting	19s
Test (ubuntu-latest)	14s
Test (ubuntu-latest, --release)	13s
Test (ubuntu-latest, --features=no_std)	15s
Test (ubuntu-latest, --features=no_std, --release)	14s
Test (windows-latest)	1m 12s
Test (windows-latest, --release)	1m 58s
Test (windows-latest, --features=no_std)	1m 32s
Test (windows-latest, --features=no_std, --release)	1m 40s
Test (macos-latest)	19s
Test (macos-latest, --release)	22s
Test (macos-latest, --features=no_std)	23s
Test (macos-latest, --features=no_std, --release)	25s
Test (macos-12)	33s
Test (macos-12, --release)	38s
Test (macos-12, --features=no_std)	37s
Test (macos-12, --features=no_std, --release)	40s
	11m 34s

Provide feedback