Add `.get(range)` #903

Job	Run time
msrv	48s
doc	14s
check format	12s
check	13s
check (--no-default-features)	17s
test	59s
check (--no-default-features --features use_alloc)	13s
semver-checks	15s
check (--all-targets --all-features)	25s
All checks succeeded	1s
	3m 37s

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