WIP: test with python 3.12

[callebtc]

Upgrades entire project from python 3.10.4 to python 3.12.4

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 62.59%. Comparing base (8675745) to head (3627fbc).
Report is 2 commits behind head on main.

Files	Patch %	Lines
cashu/nostr/client/client.py	50.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (8675745) and HEAD (3627fbc). Click for more details.

HEAD has 8 uploads less than BASE

Flag	BASE (8675745)	HEAD (3627fbc)
	9	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #599      +/-   ##
==========================================
- Coverage   69.02%   62.59%   -6.43%     
==========================================
  Files          92       92              
  Lines        8674     8657      -17     
==========================================
- Hits         5987     5419     -568     
- Misses       2687     3238     +551     

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