fix: tolerate local version in specifiers

[frostming]

Signed-off-by: Frost Ming me@frostming.com

Pull Request Checklist

• A news fragment is added in news/ describing what is new.
• Test cases added for changed code.

Describe what you have changed in this PR.

[codecov-commenter]

Codecov Report

Patch coverage: 92.30% and project coverage change: +0.01 🎉

Comparison is base (fa34573) 84.46% compared to head (31cd7e3) 84.48%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2102      +/-   ##
==========================================
+ Coverage   84.46%   84.48%   +0.01%     
==========================================
  Files         100      100              
  Lines        9669     9675       +6     
  Branches     2122     2124       +2     
==========================================
+ Hits         8167     8174       +7     
  Misses       1040     1040              
+ Partials      462      461       -1     

Flag	Coverage Δ
unittests	84.25% <92.30%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
src/pdm/models/specifiers.py	78.43% <91.66%> (+0.43%)	⬆️
src/pdm/core.py	91.61% <100.00%> (ø)

... and 1 file with indirect coverage changes

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