Enable mypy strict mode

[AdrianAtZyte]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.33%. Comparing base (da61c6f) to head (b9b2a5d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
+ Coverage   98.32%   98.33%   +0.01%     
==========================================
  Files          18       18              
  Lines         774      779       +5     
  Branches       86       86              
==========================================
+ Hits          761      766       +5     
  Misses         10       10              
  Partials        3        3              

Files with missing lines	Coverage Δ
zyte_api/_retry.py	100.00% <100.00%> (ø)
zyte_api/_x402.py	100.00% <100.00%> (ø)
zyte_api/aio/client.py	100.00% <100.00%> (ø)
zyte_api/aio/retry.py	100.00% <100.00%> (ø)
zyte_api/errors.py	100.00% <100.00%> (ø)

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