fix: useMergedState should not action on mount effect of React 18 strict mode

[zombieJ]

No description provided.

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[codecov]

Codecov Report

Merging #291 (eb3ee97) into master (6cbe2aa) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #291      +/-   ##
==========================================
+ Coverage   64.01%   64.04%   +0.02%     
==========================================
  Files          44       44              
  Lines         942      940       -2     
  Branches      330      329       -1     
==========================================
- Hits          603      602       -1     
+ Misses        301      300       -1     
  Partials       38       38              

Impacted Files	Coverage Δ
src/hooks/useState.ts	100.00% <ø> (ø)
src/hooks/useMergedState.ts	89.28% <100.00%> (+2.61%)	⬆️

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