Immediately reflect precision changes

[DesertSnow]

2 issues when changing the precision of a numeric input:

• the actual input field was only updated after regaining focus
• the actual value was not updated, even when regaining focus

An example would be a numeric input with precision '2' and value '1,25'. When changing the precision to '1', the actual value should become '1.3'.

To provided code changes would result in:

• the input field being updated immediatly
• the actual value being updated

@maintainer: I know I should have entered an issue first. However, the change was small and I am allowed to keep working on my current project without having to wait for a new release. If you need any different action from me, please notify.
Issue: #45

[codecov]

Codecov Report

Merging #44 into master will increase coverage by 0.11%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #44      +/-   ##
==========================================
+ Coverage    97.5%   97.61%   +0.11%     
==========================================
  Files           1        1              
  Lines          40       42       +2     
  Branches       14       14              
==========================================
+ Hits           39       41       +2     
  Partials        1        1

Impacted Files	Coverage Δ
src/vue-numeric.vue	97.61% <100%> (+0.11%)	⬆️

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[kevinongko]

Thanks for the PR 👍