Fix issue #325

Codecov Report

Merging #329 into master will decrease coverage by 0.03%. The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #329      +/-   ##
==========================================
- Coverage     100%   99.96%   -0.04%     
==========================================
  Files         147      147              
  Lines        2591     2595       +4     
  Branches      432      434       +2     
==========================================
+ Hits         2591     2594       +3     
- Misses          0        1       +1

Impacted Files	Coverage Δ
src/data-structures/tree/avl-tree/AvlTree.js	98.3% <83.33%> (-1.7%)	:arrow_down:

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Before

Fixed

It's still not merge into branch. omg.