Treap Implementation

[koneko096]

This treap implementation utilize two powerful operation: split and merge

• Split to separate tree into two trees based on a key
• Merge to join two trees

[codecov-io]

Codecov Report

Merging #26 into master will decrease coverage by 2.14%. The diff coverage is 74.28%.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
- Coverage   82.58%   80.44%   -2.15%     
==========================================
  Files           3        4       +1     
  Lines         201      271      +70     
==========================================
+ Hits          166      218      +52     
- Misses         26       43      +17     
- Partials        9       10       +1

Impacted Files	Coverage Δ
treap/treap.go	74.28% <74.28%> (ø)

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[theodesp]

@koneko096 Check my comments

[theodesp]

Ta