3.1.0

New:

• Performance enhancement to Maps and Sets with 8 or fewer entries.
• OrderedSet introduced.
• Map and Set can now be sorted, returning an OrderedMap or OrderedSet, respectively.
• Improved sortBy, maxBy and minBy performance

Fixed:

• Map#set or Set#add now return themselves for a no-op involving a hash collision.
• Accessing an Indexed Iterable (such as List) with strings are now coerced to number when possible, mirroring the behavior of native Array.
• List, Stack and Set constructors documentation now matches behavior.
• Records now ignore unknown keys provided to constructors.
• OrderedMap no longer leaks memory when keys are removed.