Update error handling to bubble errors that occur in reducers

[ganemone]

Fixes #81

[codecov]

Codecov Report

Merging #145 into master will increase coverage by 0.24%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #145      +/-   ##
==========================================
+ Coverage   96.77%   97.01%   +0.24%     
==========================================
  Files           1        1              
  Lines          62       67       +5     
  Branches       13       14       +1     
==========================================
+ Hits           60       65       +5     
  Misses          1        1              
  Partials        1        1

Impacted Files	Coverage Δ
src/index.js	97.01% <100%> (+0.24%)	⬆️

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[ganemone]

!merge