Add `.get(range)` #904

Job	Run time
check format	16s
doc	14s
check	17s
semver-checks	20s
msrv	42s
check (--no-default-features)	14s
test	58s
check (--no-default-features --features use_alloc)	15s
check (--all-targets --all-features)	25s
All checks succeeded	1s
	3m 42s

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