Update README.md

[ayomel]

directoty ---> directory small typo

[codecov]

Codecov Report

Merging #126 into master will increase coverage by 0.81%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
+ Coverage   89.39%   90.21%   +0.81%     
==========================================
  Files         141      143       +2     
  Lines        3168     3740     +572     
  Branches      268      350      +82     
==========================================
+ Hits         2832     3374     +542     
- Misses        318      334      +16     
- Partials       18       32      +14     

Impacted Files	Coverage Δ
src/ts/algorithms/math/lcm.ts	66.66% <0.00%> (-33.34%)	⬇️
src/ts/algorithms/greedy/knapsack.ts	66.66% <0.00%> (-33.34%)	⬇️
src/ts/algorithms/search/interpolation-search.ts	80.00% <0.00%> (-20.00%)	⬇️
src/ts/algorithms/math/primality-test.ts	90.47% <0.00%> (-9.53%)	⬇️
src/ts/algorithms/sorting/bucket-sort.ts	92.30% <0.00%> (-7.70%)	⬇️
src/ts/algorithms/math/sieve-eratosthenes.ts	92.85% <0.00%> (-7.15%)	⬇️
src/ts/algorithms/sorting/counting-sort.ts	93.75% <0.00%> (-6.25%)	⬇️
src/ts/algorithms/sorting/quicksort.ts	96.00% <0.00%> (-4.00%)	⬇️
...mic-programing/longest-common-subsequence-print.ts	97.36% <0.00%> (-2.64%)	⬇️
src/ts/others/factorial.ts	100.00% <0.00%> (ø)
... and 33 more

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