feat: arrow support className

[yoyo837]

close #448

[codecov]

Codecov Report

Merging #449 (1f84a97) into master (c91ecc4) will not change coverage.
The diff coverage is n/a.

❗ Current head 1f84a97 differs from pull request most recent head 573df4c. Consider uploading reports for the commit 573df4c to get more accurate results

@@            Coverage Diff            @@
##            master      #449   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           26        26           
  Branches        10        10           
=========================================
  Hits            26        26           

Impacted Files	Coverage Δ
src/Tooltip.tsx	100.00% <ø> (ø)

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