Implement hash table with open addressing

[oinume]

No description provided.

[codecov-io]

Codecov Report

Merging #24 into master will increase coverage by 0.91%.
The diff coverage is 77.45%.

@@            Coverage Diff            @@
##           master     #24      +/-   ##
=========================================
+ Coverage   76.19%   77.1%   +0.91%     
=========================================
  Files           5       6       +1     
  Lines         210     297      +87     
=========================================
+ Hits          160     229      +69     
- Misses         43      55      +12     
- Partials        7      13       +6

Impacted Files	Coverage Δ
src/datastructure/hash_table/chaining.go	72.6% <58.82%> (-2.05%)	⬇️
src/datastructure/hash_table/open_addressing.go	81.17% <81.17%> (ø)

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