fix(module: inputitem): fix inputitem onChange does not trigger when …

[sWhite01111]

…typing Chinese characters

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd-mobile/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[codecov]

Codecov Report

Merging #299 into master will decrease coverage by 0.02%.
The diff coverage is 91.3%.

@@            Coverage Diff            @@
##           master    #299      +/-   ##
=========================================
- Coverage   89.92%   89.9%   -0.03%     
=========================================
  Files         228     228              
  Lines        6831    6832       +1     
  Branches      551     551              
=========================================
- Hits         6143    6142       -1     
- Misses        525     526       +1     
- Partials      163     164       +1

Impacted Files	Coverage Δ
components/input-item/input-item.component.ts	98.35% <91.3%> (-1.1%)	⬇️

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[Guoyuanqiang]

close #291