Refactor: @cshooks/usetrie - Create an immutable subclass of `Trie`

[dance2die]

As suggested by @MinimumViablePerson in CodingBlocks slack on 2019-03-31 at around 1PM EST.

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Or

[dance2die]

@allcontributors[bot] please add @MinimumViablePerson for ideas

[allcontributors]

@dance2die

I've put up a pull request to add @MinimumViablePerson! 🎉