Support Python 3.15, drop 3.10, upgrade tools

[AdrianAtZyte]

Resolves #118.

@wRAR: I am sure it is one of the ideas you did not like, but until they address python/cpython#157856, I am note sure there is a better way. I thought about at least restrict the workaround to affected Python versions, but Opus says "It's harmless where it isn't needed" and "A version check would make things worse", which I don’t think I can argue.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.32%. Comparing base (90d437a) to head (ff900d1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #119   +/-   ##
=======================================
  Coverage   98.32%   98.32%           
=======================================
  Files          18       18           
  Lines         774      775    +1     
  Branches       86       86           
=======================================
+ Hits          761      762    +1     
  Misses         10       10           
  Partials        3        3           

Files with missing lines	Coverage Δ
zyte_api/__main__.py	91.79% <100.00%> (ø)
zyte_api/_async.py	98.64% <100.00%> (ø)
zyte_api/_sync.py	100.00% <100.00%> (ø)
zyte_api/errors.py	100.00% <100.00%> (ø)
zyte_api/stats.py	100.00% <100.00%> (ø)

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