fix(query-core): computed properties of QueryObserverResult

[YanZisuka]

isLoading (isPending && isFetching) is a value calculated from isPending.

Therefore, if isPending is false, isLoading becomes false, and if isLoading is true, isPending also becomes true, so modify the related type.

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Name	Status	Preview	Comments	Updated (UTC)
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[TkDodo]

I think your changes are correct. Could you please add some type-tests to verify ?

[YanZisuka]

@TkDodo

Thank you for your quick response!

Type testing is a bit new, but I've added some cases. Thanks for the review.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3a127bf) 41.71% compared to head (584cf24) 58.64%.
Report is 9 commits behind head on main.

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Additional details and impacted files

@@             Coverage Diff             @@
##             main    #6716       +/-   ##
===========================================
+ Coverage   41.71%   58.64%   +16.92%     
===========================================
  Files         179      117       -62     
  Lines        7007     4490     -2517     
  Branches     1416     1118      -298     
===========================================
- Hits         2923     2633      -290     
+ Misses       3713     1618     -2095     
+ Partials      371      239      -132     

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