Use Map for TrieNode children

[caub]

Map are more suitable and efficient for dynamically shaped hashes (quick benchmark)

[codecov-io]

Codecov Report

Merging #27 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #27   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          78     78           
  Lines        1625   1623    -2     
  Branches      289    288    -1     
=====================================
- Hits         1625   1623    -2

Impacted Files	Coverage Δ
src/data-structures/trie/TrieNode.js	100% <100%> (ø)	⬆️

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[trekhleb]

@caub
Thank you for submission! The code looks much cleaner with using Map() and that is nice.
But could you please revert your changes in package-lock.json? Seems like they are not relevant, aren't they?

[caub]

done
There's one thing slower with Map though, it's [...map.keys()] vs Object.keys(obj), but I think .suggestChildren is not used too often

[trekhleb]

Great! Thank you for contribution!