feat(Picker): add allow-html prop

[chenjiahan]

#4270

[codecov-io]

Codecov Report

Merging #4278 into dev will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev    #4278      +/-   ##
==========================================
+ Coverage   94.71%   94.72%   +<.01%     
==========================================
  Files         134      134              
  Lines        2954     2958       +4     
  Branches      270      270              
==========================================
+ Hits         2798     2802       +4     
  Misses        124      124              
  Partials       32       32

Impacted Files	Coverage Δ
src/picker/index.js	100% <ø> (ø)	⬆️
src/picker/shared.ts	100% <ø> (ø)	⬆️
src/picker/PickerColumn.js	95.83% <100%> (+0.18%)	⬆️

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