Treat paths as strings in StrParser

[Gilthans]

As discussed in #152

[codecov]

Codecov Report

Base: 96.62% // Head: 92.62% // Decreases project coverage by -3.99% ⚠️

Coverage data is based on head (e4f8cd2) compared to base (e3c32f5).
Patch coverage: 80.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #153      +/-   ##
==========================================
- Coverage   96.62%   92.62%   -4.00%     
==========================================
  Files          10       10              
  Lines         622      624       +2     
==========================================
- Hits          601      578      -23     
- Misses         21       46      +25     

Impacted Files	Coverage Δ
natsort/compat/locale.py	63.82% <60.00%> (-31.92%)	⬇️
natsort/utils.py	98.39% <100.00%> (+0.01%)	⬆️
natsort/compat/fastnumbers.py	57.14% <0.00%> (-35.72%)	⬇️
natsort/natsort.py	87.07% <0.00%> (-3.41%)	⬇️

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[Gilthans]

There is a mypy failure which seems unrelated to the change, not sure if this was passing beforehand?

[SethMMorton]

Ugh - that is likely due to an update in mypy.

Want to take a stab? I think it could be solved with an if statement... it's because getlocale() can return (None, None) if the locale is "C".

[Gilthans]

Fixed (hope it's OK in the same PR).
Locally mypy was complaining about a bunch of other things as well, so I wasn't able to see it green locally, not sure why the CI is ok with those.
The errors in the CI did go away though

[Gilthans]

Friendly ping - would love to see this fix upstream!

[SethMMorton]

Released with 8.2.0.