Fix reducer bug in case of use optional thunk id.

[VitaliiSubochev]

In case of use optional thunk identifier, reducer not update properly state i.e. request action not pass to any state from pending state.

[codecov-io]

Codecov Report

Merging #36 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #36   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           5      5           
  Lines         134    135    +1     
  Branches       46     46           
=====================================
+ Hits          134    135    +1

Impacted Files	Coverage Δ
src/reducer.js	100% <100%> (ø)	⬆️

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[diegohaz]

Hi @vitalystr. Thank you for the PR. Could you please write a test that illustrates your use case?

[VitaliiSubochev]

As I understand it a problem in compiled code in /dist folder on /src it works great. Chunk of code
if (!value) { newValue = { ...substate[name] } delete newValue[id] } else { newValue = { ...substate[name], [id]: true } }
compile into
if (!value) { newValue = _extends({}, substate[name]); delete newValue[id]; } else { newValue = _extends({}, substate[name], _defineProperty({}, id, true)); }

and its not work in my app.