Ensure Windows short paths are resolved to long paths

[SuperValou]

Fixes #49

This PR fixes an issue where Windows short names would not be resolved to their corresponding long names and cause rez-pip to raise an error.

[JeanChristopheMorinPerso]

Closing and re-opening to see if I can can the GH to trigger the tests.

[codecov]

Codecov Report

Merging #50 (59d040f) into main (f1a5080) will decrease coverage by 0.12%.
The diff coverage is 0.00%.

❗ Current head 59d040f differs from pull request most recent head 214f68a. Consider uploading reports for the commit 214f68a to get more accurate results

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
- Coverage   77.55%   77.44%   -0.12%     
==========================================
  Files           8        8              
  Lines         704      705       +1     
  Branches      146      146              
==========================================
  Hits          546      546              
- Misses        150      151       +1     
  Partials        8        8              

Files	Coverage Δ
src/rez_pip/rez.py	66.40% <0.00%> (-0.53%)	⬇️

[JeanChristopheMorinPerso]

Thanks @SuperValou! I just merged your PR and I'll see if I can release a new version today.