Update vue-numeric-input.vue

[Trigur]

Fix NaN when value is empty

[codecov-io]

Codecov Report

Merging #5 into master will not change coverage. The diff coverage is 100%.

@@           Coverage Diff           @@
##           master       #5   +/-   ##
=======================================
  Coverage   96.42%   96.42%           
=======================================
  Files           1        1           
  Lines          56       56           
  Branches       16       16           
=======================================
  Hits           54       54           
  Partials        2        2

Impacted Files	Coverage Δ
src/vue-numeric-input.vue	96.42% <100%> (ø)	:arrow_up:

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[MartinKleikamp]

Why this is closed? I do not find the merge in master. In my opinion this resolves a valid issue with initial null values, as consequence you have to click twice on + or - initially. I tested this pull request successfully.