Picker 适配微信小程序

[DiamondYuan]

1. 修改 cascader-picker 的实现，不依赖 onFormat
2. picker 新增参数 formattedValueText

[github-actions]

🎊 PR Preview dd2b8d2 has been successfully built and deployed to https://ant-design-ant-design-mini-preview-pr-976.surge.sh

🕐 Build time: 253.314s

_{🤖 By surge-preview}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3a48061) 82.81% compared to head (dd2b8d2) 83.21%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #976      +/-   ##
==========================================
+ Coverage   82.81%   83.21%   +0.40%     
==========================================
  Files          99       99              
  Lines        2746     2818      +72     
  Branches      749      774      +25     
==========================================
+ Hits         2274     2345      +71     
- Misses        395      396       +1     
  Partials       77       77              

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