fix(comp:cascader): onChange not working

[sallerli1]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

IxCascader 的 onChange 失效

What is the new behavior?

修复以上问题
补充测试用例

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1528 (740dcdd) into main (c758931) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 740dcdd differs from pull request most recent head 91118b9. Consider uploading reports for the commit 91118b9 to get more accurate results

@@           Coverage Diff           @@
##             main    #1528   +/-   ##
=======================================
  Coverage   92.77%   92.78%           
=======================================
  Files         332      332           
  Lines       30897    30907   +10     
  Branches     3556     3557    +1     
=======================================
+ Hits        28666    28676   +10     
  Misses       2231     2231           

Impacted Files	Coverage Δ
packages/components/cascader/src/Cascader.tsx	85.04% <100.00%> (+0.35%)	⬆️
packages/components/config/src/defaultConfig.ts	100.00% <100.00%> (ø)
packages/components/icon/src/definitions.ts	100.00% <100.00%> (ø)
packages/components/icon/src/dependencies.ts	99.16% <100.00%> (ø)
packages/components/stepper/src/StepperItem.tsx	96.12% <100.00%> (ø)

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