fix: document.activeElement cannot get correct dom when the component…

[rzyanhao]

document.activeElement cannot get correct dom when the component is placed in shadow dom

[vercel]

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🔍 Inspect: https://vercel.com/react-component/picker/5tne6NJBNun5omSwYgY26wk2wuoa
✅ Preview: https://picker-git-fork-rzyanhao-master-react-component.vercel.app

[codecov]

Codecov Report

Merging #221 (f6f4db1) into master (c0963ac) will decrease coverage by 0.04%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master     #221      +/-   ##
==========================================
- Coverage   99.57%   99.52%   -0.05%     
==========================================
  Files          45       45              
  Lines        2101     2104       +3     
  Branches      617      619       +2     
==========================================
+ Hits         2092     2094       +2     
- Misses          7        8       +1     
  Partials        2        2              

Impacted Files	Coverage Δ
src/hooks/usePickerInput.ts	98.73% <75.00%> (-1.27%)	⬇️

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