Breaking: return value instead of index

[seeliang]

No description provided.

[codecov-io]

Codecov Report

Merging #57 into master will decrease coverage by 1.07%.
The diff coverage is 92.45%.

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
- Coverage   96.38%   95.31%   -1.08%     
==========================================
  Files           2        6       +4     
  Lines          83      128      +45     
  Branches       16       27      +11     
==========================================
+ Hits           80      122      +42     
- Misses          3        6       +3

Impacted Files	Coverage Δ
src/molecules/checkbox/index.js	81.81% <100%> (ø)	⬆️
src/helpers/mappingSelectedIndexToResult.js	100% <100%> (ø)
src/helpers/initialFormState.js	100% <100%> (ø)
src/index.js	97.46% <83.33%> (-1.15%)	⬇️
src/helpers/rangeToList.js	88.88% <88.88%> (ø)
src/helpers/generatePropsWithData.js	88.88% <88.88%> (ø)

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