Change state to 'normal' if 'src' is valid

[skycrazyk]

Possible fix for #277

Explaining

We are not providing onLoad handler if status=error and there is a fallback image. So if src was changed to "valid" There is no way status can be changed to "normal".

Possible decision is to change status to normal when src checked and became valid

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[codecov]

Codecov Report

Merging #278 (d87f5aa) into master (cbf9d8a) will decrease coverage by 0.25%.
The diff coverage is 66.66%.

❗ Current head d87f5aa differs from pull request most recent head 6ce7dc5. Consider uploading reports for the commit 6ce7dc5 to get more accurate results

@@            Coverage Diff             @@
##           master     #278      +/-   ##
==========================================
- Coverage   97.90%   97.65%   -0.25%     
==========================================
  Files          13       13              
  Lines         382      384       +2     
  Branches      108      109       +1     
==========================================
+ Hits          374      375       +1     
- Misses          7        8       +1     
  Partials        1        1              

Files Changed	Coverage Δ
src/hooks/useStatus.ts	92.30% <66.66%> (-3.53%)	⬇️

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[afc163]

Could you add a test case?

[skycrazyk]

@afc163 I created a simpler reproduce example https://codepen.io/skycrazyk/pen/KKbMZwo, but I cannot catch such error in jest environment

[skycrazyk]

Fixed here #281