Has fractional part

[desdulianto]

this closes #18

[codecov]

Codecov Report

Merging #35 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #35   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      2    +1     
  Lines          22     23    +1     
  Branches        6      7    +1     
=====================================
+ Hits           22     23    +1

Impacted Files	Coverage Δ
.../com/github/mkdika/jenerickt/function/DoubleFun.kt	100% <100%> (ø)

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[mkdika]

Okay, review and merge.