:hammer_and_wrench: debounce-handler handle no prop case

[danielemery]

We are using debounce-handler to enhance a component with optional props, we would like to debounce them only if they are present. At the moment this results in an error (see test case).

[codecov-io]

Codecov Report

Merging #26 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #26   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          17     17           
  Lines         242    244    +2     
=====================================
+ Hits          242    244    +2

Impacted Files	Coverage Δ
packages/debounce-handler/src/index.js	100% <100%> (ø)	:arrow_up:

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