fix: Added safeguard for extreme aspect ratio in Resize

[fg-mindee]

This PR fixes the second part of the unittest failures: now that we're positive no crop is 0-sized, in rare cases, preserving the aspect ratio can lead to a 0-sized intermediate image size.

This should not be encountered for trained models but this PR adds a clipping to 1 pixel in case this happens!

Any feedback is welcome!

[codecov]

Codecov Report

Merging #695 (37b32d6) into main (74d9e65) will decrease coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #695      +/-   ##
==========================================
- Coverage   96.16%   96.08%   -0.09%     
==========================================
  Files         124      124              
  Lines        4647     4647              
==========================================
- Hits         4469     4465       -4     
- Misses        178      182       +4     

Flag	Coverage Δ
unittests	96.08% <100.00%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
doctr/transforms/modules/pytorch.py	100.00% <100.00%> (ø)
...dels/detection/differentiable_binarization/base.py	90.00% <0.00%> (-2.78%)	⬇️
doctr/models/builder.py	96.49% <0.00%> (-2.64%)	⬇️
doctr/models/detection/linknet/base.py	87.12% <0.00%> (+3.96%)	⬆️

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[charlesmindee]

Thanks!