fix(input-number): display value style is broken (#158)

[kiaking]

fix #158

I've also just fixed the code style for this component.

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[codecov]

Codecov Report

Base: 35.01% // Head: 35.10% // Increases project coverage by +0.09% 🎉

Coverage data is based on head (e647fb4) compared to base (64301f8).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #162      +/-   ##
==========================================
+ Coverage   35.01%   35.10%   +0.09%     
==========================================
  Files          99       99              
  Lines        7949     7961      +12     
  Branches      131      131              
==========================================
+ Hits         2783     2795      +12     
  Misses       5166     5166              

Impacted Files	Coverage Δ
lib/components/SInputNumber.vue	100.00% <100.00%> (ø)
lib/components/SInputText.vue	97.47% <100.00%> (+0.09%)	⬆️

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